Fix build failure due to missing break

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@364380 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Basic/Targets/ARM.cpp

@@ -910,6 +910,7 @@ bool ARMTargetInfo::validateAsmConstraint(
       Name++;
       return true;
     }
+    break;
   case 'U': // a memory reference...
     switch (Name[1]) {
     case 'q': // ...ARMV4 ldrsb
@@ -925,6 +926,7 @@ bool ARMTargetInfo::validateAsmConstraint(
       Name++;
       return true;
     }
+    break;
   }
   return false;
 }