Implement support for anonymous structs and unions in C. Both C and
C++ handle anonymous structs/unions in the same way. Addresses several
bugs:

  <rdar://problem/6259534>
  <rdar://problem/6481130>
  <rdar://problem/6483159>

The test case in PR clang/1750 now passes with -fsyntax-only, but
CodeGen for inline assembler still fails.

llvm-svn: 62112
diff --git a/clang/test/Parser/cxx-class.cpp b/clang/test/Parser/cxx-class.cpp
index 39b787f..7ad6344 100644
--- a/clang/test/Parser/cxx-class.cpp
+++ b/clang/test/Parser/cxx-class.cpp
@@ -8,7 +8,7 @@
 
   struct S {};
   enum {};
-  int; // expected-error {{error: declaration does not declare anything}}
+  int; // expected-error {{declaration does not declare anything}}
   int : 1, : 2;
 
 public: