Make -mms-bitfields behave consistently.

Patch by Jeremiah Zanin.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165849 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/pragma-ms_struct.c b/test/Sema/pragma-ms_struct.c
index d76ee8b..6533320 100644
--- a/test/Sema/pragma-ms_struct.c
+++ b/test/Sema/pragma-ms_struct.c
@@ -31,6 +31,12 @@
                    unsigned long bf_2 : 12;
 } __attribute__((ms_struct)) t2;
 
+enum
+{
+  A = 0,
+  B,
+  C
+} __attribute__((ms_struct)) e1; // expected-warning {{'ms_struct' attribute ignored}}
 
 // rdar://10513599
 #pragma ms_struct on