[Parser] Handle __pragma(pack, etc. after type definitions

Support certain MS pragmas right after the closing curly brace of a
class.  Clang did not expect __pragma in this position.

This fixes PR28094.

llvm-svn: 272628
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index 746f996..be694901 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -3453,6 +3453,22 @@
       ParseDecltypeSpecifier(DS);
       continue;
 
+    case tok::annot_pragma_pack:
+      HandlePragmaPack();
+      continue;
+
+    case tok::annot_pragma_ms_pragma:
+      HandlePragmaMSPragma();
+      continue;
+
+    case tok::annot_pragma_ms_vtordisp:
+      HandlePragmaMSVtorDisp();
+      continue;
+
+    case tok::annot_pragma_ms_pointers_to_members:
+      HandlePragmaMSPointersToMembers();
+      continue;
+
     case tok::kw___underlying_type:
       ParseUnderlyingTypeSpecifier(DS);
       continue;