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.

llvm-svn: 172945

clang/lib/Frontend/CompilerInvocation.cpp

@@ -577,7 +577,6 @@ bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
   }
   Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
-  Opts.DumpBuildInformation = Args.getLastArgValue(OPT_dump_build_information);
   addWarningArgs(Args, Opts.Warnings);
 
   return Success;