VS: Generate Nsight Tegra project revision number

Nsight Tegra 2.0 will be revision '8'.  Generate this revision number
and add a NsightTegraUpgradeOnceWithoutPrompt element to tell newer
versions not to prompt when upgrading the generated project file.

Source/cmVisualStudio10TargetGenerator.h

@@ -142,6 +142,7 @@ private:
   std::string Name;
   bool MSTools;
   bool NsightTegra;
+  int  NsightTegraVersion[4];
   bool TargetCompileAsWinRT;
   cmGlobalVisualStudio10Generator* GlobalGenerator;
   cmGeneratedFileStream* BuildFileStream;