Rename DiagnosticClient to DiagnosticConsumer as per issue 5397


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140479 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/AST/APValueTest.cpp b/unittests/AST/APValueTest.cpp
index 0183938..44ad8cc 100644
--- a/unittests/AST/APValueTest.cpp
+++ b/unittests/AST/APValueTest.cpp
@@ -21,7 +21,7 @@
 namespace {
 
 class DiagnosticOutputGetter {
-  class LastDiagnosticString : public DiagnosticClient {
+  class LastDiagnosticString : public DiagnosticConsumer {
     SmallString<64> LastDiagnostic;
   public:
     virtual void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,