pkg/tweetnacl: Use RIOT random_bytes instead of randombytes

pkg/tweetnacl/Makefile

@@ -6,7 +6,6 @@ PKG_LICENSE=PD
 .PHONY: all
 
 all: git-download
-	@cp $(RIOTBASE)/pkg/tweetnacl/src/* $(PKG_BUILDDIR)
-	"$(MAKE)" -C $(PKG_BUILDDIR)
+	$(Q)"$(MAKE)" -C $(PKG_BUILDDIR) -f $(CURDIR)/Makefile.riot
 
-include $(RIOTBASE)/pkg/pkg.mk
+include $(RIOTBASE)/pkg/pkg.mk
\ No newline at end of file

pkg/tweetnacl/src/Makefile → pkg/tweetnacl/Makefile.riot

 MODULE=tweetnacl
 
-include $(RIOTBASE)/Makefile.base
+include $(RIOTBASE)/Makefile.base
\ No newline at end of file

pkg/tweetnacl/src/randombytes.c

-/*
- * Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
- */
-
-#include <stdint.h>
-#include "random.h"
-
-void randombytes(uint8_t *target, uint64_t n)
-{
-    /* tweetnacl needs uint64_t as "n" parameter, random provides uint32 */
-    random_bytes(target, n);
-}