[Sanitizer] Make UNIMPLEMENTED macro common.

llvm-svn: 158077
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h b/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h
index cddd9a8..6ed7052 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h
@@ -95,4 +95,6 @@
 #define CHECK_GT(a, b) CHECK_IMPL((a), >,  (b))
 #define CHECK_GE(a, b) CHECK_IMPL((a), >=, (b))
 
+#define UNIMPLEMENTED() CHECK("unimplemented" && 0)
+
 #endif  // SANITIZER_DEFS_H