Add basic command line parsing to TestMain.

Summary:
This allows unit tests for components that use Support/Debug.h to print
debug information from test runs by specifying -debug when running the
test.

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D301

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172801 91177308-0d34-0410-b5e6-96231b3b80d8

utils/unittest/UnitTestMain/TestMain.cpp

@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Config/config.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Signals.h"
 #include "gtest/gtest.h"
 
@@ -22,6 +23,7 @@
 int main(int argc, char **argv) {
   llvm::sys::PrintStackTraceOnErrorSignal();
   testing::InitGoogleTest(&argc, argv);
+  llvm::cl::ParseCommandLineOptions(argc, argv);
 
 # if defined(LLVM_ON_WIN32)
   // Disable all of the possible ways Windows conspires to make automated