[TestPtrRefsObjC] Prefer command script import.

Author: Davide Italiano

lldb/test/API/lang/objc/ptr_refs/TestPtrRefsObjC.py

@@ -44,6 +44,6 @@ def test_ptr_refs(self):
 
         frame = thread.GetFrameAtIndex(0)
 
-        self.runCmd("script import lldb.macosx.heap")
+        self.runCmd("command script import lldb.macosx.heap")
         self.expect("ptr_refs self", substrs=["malloc", "stack"])