Add a missing 'break' to ensure that we reject inline assembly
constraints we don't recognize.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162064 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 883864f..769f777 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3085,7 +3085,7 @@
                                      TargetInfo::ConstraintInfo &Info) const {
     // FIXME: Check if this is complete
     switch (*Name) {
-    default:
+    default: break;
     case 'l': // r0-r7
     case 'h': // r8-r15
     case 'w': // VFP Floating point register single precision