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, 1 insertions, 1 deletions

diff --git a/Source/cmFindCommon.h b/Source/cmFindCommon.h
index 32542f0..b237f1b 100644
--- a/Source/cmFindCommon.h
+++ b/Source/cmFindCommon.h
@@ -25,7 +25,7 @@ class cmFindCommon : public cmCommand
 {
 public:
   cmFindCommon();
-  ~cmFindCommon() CM_OVERRIDE;
+  ~cmFindCommon() override;
 
 protected:
   friend class cmSearchPath;