Add missing InGroup for this warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173429 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticSemaKinds.td

@@ -3276,7 +3276,7 @@ def note_deleted_assign_field : Note<
 // This should eventually be an error.
 def warn_undefined_internal : Warning<
   "%select{function|variable}0 %q1 has internal linkage but is not defined">,
-  DiagGroup<"undefined-internal">;
+  InGroup<DiagGroup<"undefined-internal">>;
 def note_used_here : Note<"used here">;
 
 def warn_internal_in_extern_inline : ExtWarn<

test/Misc/warning-flags.c

@@ -18,7 +18,7 @@ This test serves two purposes:
 
 The list of warnings below should NEVER grow.  It should gradually shrink to 0.
 
-CHECK: Warnings without flags (146):
+CHECK: Warnings without flags (145):
 CHECK-NEXT:   ext_delete_void_ptr_operand
 CHECK-NEXT:   ext_enum_friend
 CHECK-NEXT:   ext_expected_semi_decl_list
@@ -160,7 +160,6 @@ CHECK-NEXT:   warn_unavailable_fwdclass_message
 CHECK-NEXT:   warn_undef_interface
 CHECK-NEXT:   warn_undef_interface_suggest
 CHECK-NEXT:   warn_undef_protocolref
-CHECK-NEXT:   warn_undefined_internal
 CHECK-NEXT:   warn_unknown_method_family
 CHECK-NEXT:   warn_use_out_of_scope_declaration
 CHECK-NEXT:   warn_weak_identifier_undeclared