Nuke SetUpBuildDumpLog.

Also, it was the only reason that `argc` and `argv` were being passed
into createDiagnostics, so remove those parameters and clean up callers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172945 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/cc1_main.cpp b/tools/driver/cc1_main.cpp
index 6e19200..f54c878 100644
--- a/tools/driver/cc1_main.cpp
+++ b/tools/driver/cc1_main.cpp
@@ -81,7 +81,7 @@
       CompilerInvocation::GetResourcesPath(Argv0, MainAddr);
 
   // Create the actual diagnostics engine.
-  Clang->createDiagnostics(ArgEnd - ArgBegin, const_cast<char**>(ArgBegin));
+  Clang->createDiagnostics();
   if (!Clang->hasDiagnostics())
     return 1;