This is just a compatibility issue waiting to happen as soon as there
is support for a more standard-compliant implementation of BLE (like
e.g. NimBLE ;-)).

BUILD_DIR was introduced but the variable was already used by
`pkg/jerryscript` so there is a name collision.
Namespace it to prevent issues.

Signed-off-by: Dylan Laduranty <dylan.laduranty@mesotic.com>

There was a cast in a macro that calculated offsets. Since it was
only doing a pointer difference, the cast was inocuous, but I fix
it anyways.

Upstream lua has many instances of discarding cont qualifiers through
explicit casting. This disables the warnigns for the package so that
they don't show up when one enables -Wno-cast-qual globally.

Re-enable LLVM/clang now that system includes are used.
It compiles and correctly executes examples/javascript.

Jerryscript was never using INCLUDES so never having the 'newlib-nano' or llvm
includes. It prevented working with `llvm`.

Disable unsupported warnings for ESP32 and ESP8266 newlib that show when
using system includes.
 * tested newlib version for ESP32 is 2.2.0
 * tested newlib version for ESP8266 is 3.0.0

Build into the BINDIR directory instead of the source repository.
This makes 'clean' work as expected without other intervention.

Also it goes in the direction of having the package source repository
board independent.

Remove unknown rules from .PHONY.
Make 'all' be the default target for jerryscript and execute `all` target.
This way no definition order issue could happen in the future.

Do not include Makefile.base as 'DIRS' are not used here.
Also if 'all' target was to be used, there would be two rules creating
`$(BINDIR)/jerryscript.a`.

By default `Makefile.jerryscript` executes `libjerry` as it is the first
target.

The -Wno-sometimes-uninitialized suppression seems to no longer be
necessary. Removing it as it may mask a real bug.

If the problem reappears, and if the comment is correct about it
being only in an unused function, then instead of adding the CFLAG,
it should be fixed locally via a patch.

Nimble contains a couple of casts that discard alignment information.
This causes a warning with clang's -Wno-address-of-packed-member.

A previous PR (#10503) supressed that warning. This commit re-enables
them and provides a patch to fix the offending code.

The fix has been submitted upstream, see
https://github.com/apache/mynewt-nimble/pull/252

This moves tests for the relic package from unittests to a regular
test, which should help to decrease binary size of unittests.

Upstream rewrote history in master which changed our reference commit from

    https://github.com/01org/tinycrypt/commit/3ea1a609e7aff9f2d8d13803e1076b7a8e551804

to

    https://github.com/01org/tinycrypt/commit/6a22712bebbf2fc60d9fc6192dddefd5ad1933e3

Diff can be verified to be empty with:

    https://github.com/01org/tinycrypt/compare/6a22712bebbf2fc60d9fc6192dddefd5ad1933e3...3ea1a609e7aff9f2d8d13803e1076b7a8e551804

From lwIP CHANGELOG

(STABLE-2.1.2):

  ++ Bugfixes:

  2018-11-21: Jens Nielsen
  * netbiosns.c: fix expecting too large packet (bug #55069)

  2018-11-19: Dirk Ziegelmeier
  * smtp.c: fix compiling with strict C compatibility because of strnlen (bug #55034)

  2018-11-12: Simon Goldschmidt
  * tcp.c: fix overflow check in tcp_recved triggering invalid assertion (bug #55015)

  2018-11-12: Simon Goldschmidt
  * tcp.c: fix a bug in sending RST segments (sent from port 0)

(STABLE-2.1.1):

  ++ Bugfixes:

  2018-11-01: Joan Lledó
  * sockets.c: fix bad assertion in lwip_poll_dec_sockets_used() (bug #54933)

  2018-11-01: Dirk Ziegelmeier
  * ip4.c: don't send 127.* to default netif (bug #54670)

  2018-10-23: David Girault
  * altcp_tls_mbedtls.c: fix use-after free (bug #54774)

  2018-10-23: Ognjen Bjelica, Dirk Ziegelmeier
  * snmp_scalar.c: Avoid NULL pointer dereference (bug #54886)

  2018-10-23: Simon Goldschmidt
  * Fix missing standard includes in multiple files

  2018-10-17: Ivan Warren
  * def.h: fix casting htonX and ntohX to u16_t (bug #54850)

  2018-10-12: Simon Goldschmidt
  * Revert "tcp_abandon: no need to buffer pcb->local_port" (fix that source port was 0 for RST
    called when aborting a connection)

  2018-10-11: Jonas Rabenstein
  * tcp.c: tcp_recved: check for overflow and warn about too big values (patch #9699)

  2018-10-06: Joan Lledó
  * sockets.c: alloc_socket(): Check for LWIP_SOCKET_POLL when setting select-
    related variables (patch #9696)

  2018-10-04: Spencer
  * tcp.c: Update prev pointer when skipping entries in tcp_slowtmr (patch #9694)

  2018-09-27: Martine Lenders
  * lowpan6.c: Fix IEEE 802.15.4 address setting (bug #54749)

* Declare optional dependency to periph_rtc
* Move CFLAGS definition to Makefile.include

The `src` member of `sock_udp_t` for `emb6` is a pointer, not a value,
so it should not be referenced.

This fixes the output issue encountered during the
[2018.10 RC1 testing][RC1].

[RC1]: https://github.com/RIOT-OS/Release-Specs/issues/76#issuecomment-435924505

Patch cherry-picked into upstream as [a47d30f].

[a47d30f]: http://git.savannah.nongnu.org/cgit/lwip.git/commit/?id=a47d30ffc7d36a79307486ca5e9a48f5bf89c7b6