makefiles/arch/native: don't be pedantic

We don't enable this on any other architecture.
-pedantic doesn't give us any more beneficial wanrings, only warns
about language extensions that are implemented by both GCC and Clang
anyway.

Since those are the only compilers we are targeting, we can just make
use of them to make our lives easier.

makefiles/arch/native.inc.mk

@@ -16,7 +16,7 @@ export CGANNOTATE ?= cg_annotate
 export GPROF ?= gprof
 
 # basic cflags:
-CFLAGS += -Wall -Wextra -pedantic $(CFLAGS_DBG) $(CFLAGS_OPT)
+CFLAGS += -Wall -Wextra $(CFLAGS_DBG) $(CFLAGS_OPT)
 CFLAGS += -U_FORTIFY_SOURCE
 CFLAGS_DBG ?= -g3