cmGlobalCommonGenerator: Adopt GetEditCacheTargetName

The implementation is the same for both Makefile and Ninja generators.

Source/cmGlobalCommonGenerator.h

@@ -45,4 +45,5 @@ public:
 
 protected:
   virtual bool SupportsDirectConsole() const { return true; }
+  const char* GetEditCacheTargetName() const override { return "edit_cache"; }
 };

Source/cmGlobalNinjaGenerator.h

@@ -220,7 +220,6 @@ public:
   {
     return "package_source";
   }
-  const char* GetEditCacheTargetName() const override { return "edit_cache"; }
   const char* GetRebuildCacheTargetName() const override
   {
     return "rebuild_cache";

Source/cmGlobalUnixMakefileGenerator3.h

@@ -228,7 +228,6 @@ protected:
   {
     return "package_source";
   }
-  const char* GetEditCacheTargetName() const override { return "edit_cache"; }
   const char* GetRebuildCacheTargetName() const override
   {
     return "rebuild_cache";