Merge pull request #5798 from aabadie/nucleo-f030

boards/nucleo-f030/Makefile

boards/nucleo-f030/Makefile.features

boards/nucleo-f030/Makefile.include

boards/nucleo-f030/board.c

boards/nucleo-f030/dist/openocd.cfg

boards/nucleo-f030/include/board.h

boards/nucleo-f030/include/periph_conf.h

cpu/stm32f0/include/cpu_conf.h

cpu/stm32f0/include/stm32f030x8.h

cpu/stm32f0/ldscripts/stm32f030r8.ld

examples/gnrc_border_router/Makefile

examples/gnrc_networking/Makefile

examples/gnrc_tftp/Makefile

examples/microcoap_server/Makefile

examples/posix_sockets/Makefile

tests/coap/Makefile

tests/conn_ip/Makefile

tests/driver_xbee/Makefile

tests/gnrc_ipv6_ext/Makefile

tests/gnrc_sixlowpan/Makefile