Makefile.commonarch: use proper CFLAGS for jmp-unwind.c

Filter out libpthread CFLAGS

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.commonarch

@@ -141,6 +141,7 @@ CFLAGS-OMIT-unregister-atfork.c = -DNOT_IN_libc -DIS_IN_libpthread
 CFLAGS-OMIT-getpid.c = -DNOT_IN_libc -DIS_IN_libpthread
 CFLAGS-OMIT-raise.c = -DNOT_IN_libc -DIS_IN_libpthread
 CFLAGS-OMIT-sleep.c = -DNOT_IN_libc -DIS_IN_libpthread
+CFLAGS-OMIT-jmp-unwind.c = -DNOT_IN_libc -DIS_IN_libpthread
 CFLAGS-OMIT-libc-lowlevellock.c = -DNOT_IN_libc -DIS_IN_libpthread
 
 CFLAGS-OMIT-close.S = -DNOT_IN_libc -DIS_IN_libpthread