Pulls diagnostics for temp file handling into the common diagnostic kinds.

llvm-svn: 156947
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 872be32..9340ba1 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -1635,7 +1635,7 @@
   llvm::sys::Path P(TmpDir);
   P.appendComponent(Prefix);
   if (P.makeUnique(false, &Error)) {
-    Diag(clang::diag::err_drv_unable_to_make_temp) << Error;
+    Diag(clang::diag::err_unable_to_make_temp) << Error;
     return "";
   }