Use C++11 override instead of CM_OVERRIDE

We now require C++11 support including `override`.  Drop use of
the old compatibility macro.  Convert references as follows:

    git grep -l CM_OVERRIDE -- '*.h' '*.hxx' '*.cxx' |
      xargs sed -i 's/CM_OVERRIDE/override/g'

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmMakefileUtilityTargetGenerator.h b/Source/cmMakefileUtilityTargetGenerator.h
index 2826392..be243a7 100644
--- a/Source/cmMakefileUtilityTargetGenerator.h
+++ b/Source/cmMakefileUtilityTargetGenerator.h
@@ -13,11 +13,11 @@ class cmMakefileUtilityTargetGenerator : public cmMakefileTargetGenerator
 {
 public:
   cmMakefileUtilityTargetGenerator(cmGeneratorTarget* target);
-  ~cmMakefileUtilityTargetGenerator() CM_OVERRIDE;
+  ~cmMakefileUtilityTargetGenerator() override;
 
   /* the main entry point for this class. Writes the Makefiles associated
      with this target */
-  void WriteRuleFiles() CM_OVERRIDE;
+  void WriteRuleFiles() override;
 
 protected:
 };