Driver: Sink Driver/Compilation into clang::driver namespace.
 - Add OptTable instance to Driver.

llvm-svn: 66063
diff --git a/clang/lib/Driver/Compilation.cpp b/clang/lib/Driver/Compilation.cpp
index 7f3454b..a636e2d 100644
--- a/clang/lib/Driver/Compilation.cpp
+++ b/clang/lib/Driver/Compilation.cpp
@@ -8,7 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/Driver/Compilation.h"
-using namespace clang;
+using namespace clang::driver;
 
 Compilation::Compilation() {
 }