Un-namespace-qualify llvm_unreachable. It's a macro, so the qualification gave
no extra safety anyway.

llvm-svn: 91207
diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp
index e244d3c..96a68c9 100644
--- a/clang/lib/Frontend/FrontendAction.cpp
+++ b/clang/lib/Frontend/FrontendAction.cpp
@@ -222,5 +222,5 @@
 ASTConsumer *
 PreprocessorFrontendAction::CreateASTConsumer(CompilerInstance &CI,
                                               llvm::StringRef InFile) {
-  llvm::llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!");
+  llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!");
 }