ENH: add CMAKE_CFG_INTDIR

Source/cmGlobalXCodeGenerator.cxx

@@ -69,6 +69,7 @@ void cmGlobalXCodeGenerator::EnableLanguage(std::vector<std::string>const&
                                             lang,
                                             cmMakefile * mf)
 { 
+  mf->AddDefinition("CMAKE_CFG_INTDIR",".");
   mf->AddDefinition("CMAKE_GENERATOR_CC", "gcc");
   mf->AddDefinition("CMAKE_GENERATOR_CXX", "g++");
   mf->AddDefinition("CMAKE_GENERATOR_NO_COMPILER_ENV", "1");