Update the error handing static functions for r178161.
Part of rdar://13296693


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178162 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/cc1as_main.cpp b/tools/driver/cc1as_main.cpp
index 726af19..232ea2f 100644
--- a/tools/driver/cc1as_main.cpp
+++ b/tools/driver/cc1as_main.cpp
@@ -384,7 +384,8 @@
   return Success;
 }
 
-static void LLVMErrorHandler(void *UserData, const std::string &Message) {
+static void LLVMErrorHandler(void *UserData, const std::string &Message,
+                             bool GenCrashDiag) {
   DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData);
 
   Diags.Report(diag::err_fe_error_backend) << Message;