crt: Regenerate Makefile.in
crt: Build CRT_fp10.c into libmingwex.a instead of libmingw32.a
headers: math.h: Don't forward declare _exception
crt: Add missing __MINGW_IMP_SYMBOL
crt: test: Use CRT variables _osplatform and _winver in t_stat.c
crt: test: Use CRT variable _winver in t_safe_flush.c
crt: Regenerate configure and Makefile.in
crt: Add CRT_fp4.o for 24-bit x87 precision