bfin: set an invalid insn for abort

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libc/sysdeps/linux/bfin/bits/uClibc_arch_features.h

@@ -6,8 +6,7 @@
 #define _BITS_UCLIBC_ARCH_FEATURES_H
 
 /* instruction used when calling abort() to kill yourself */
-/*#define __UCLIBC_ABORT_INSTRUCTION__ "asm instruction"*/
-#undef __UCLIBC_ABORT_INSTRUCTION__
+#define __UCLIBC_ABORT_INSTRUCTION__ ".short 2"	/* invalid 116bit insn */
 
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__