Driver: ArgList doesn't depend on Options.h anymore.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89313 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Compilation.cpp b/lib/Driver/Compilation.cpp
index c12f5aa..ffa627a 100644
--- a/lib/Driver/Compilation.cpp
+++ b/lib/Driver/Compilation.cpp
@@ -13,6 +13,7 @@
 #include "clang/Driver/ArgList.h"
 #include "clang/Driver/Driver.h"
 #include "clang/Driver/DriverDiagnostic.h"
+#include "clang/Driver/Options.h"
 #include "clang/Driver/ToolChain.h"
 
 #include "llvm/Support/raw_ostream.h"