Driver: I was too hasty in free'ing Actions, we sometimes share

Actions so a simple tree traversal isn't quite good enough. Leaving a
FIXME for now.

llvm-svn: 67161

clang/lib/Driver/Action.cpp

@@ -13,9 +13,8 @@
 using namespace clang::driver;
 
 Action::~Action() {
-  // Free the inputs.
-  for (iterator it = begin(), ie = end(); it != ie; ++it)
-    delete *it;  
+  // FIXME: Free the inputs. The problem is that BindArchAction shares
+  // inputs; so we can't just walk the inputs.
 }
 
 const char *Action::getClassName(ActionClass AC) {