Driver/Darwin: Make the compilation object available in AddLinkArgs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113549 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.h b/lib/Driver/Tools.h
index b5defa4..63faf91 100644
--- a/lib/Driver/Tools.h
+++ b/lib/Driver/Tools.h
@@ -232,7 +232,8 @@
   };
 
   class LLVM_LIBRARY_VISIBILITY Link : public DarwinTool  {
-    void AddLinkArgs(const ArgList &Args, ArgStringList &CmdArgs) const;
+    void AddLinkArgs(Compilation &C, const ArgList &Args,
+                     ArgStringList &CmdArgs) const;
 
   public:
     Link(const ToolChain &TC) : DarwinTool("darwin::Link", "linker", TC) {}