Disable the Gmail resource in KDE 4.14

There are too many issues that cannot be solved this late in 4.14 cycle.
I'm disabling the resource in 4.14 as it's simply not production-ready
yet.

resources/CMakeLists.txt

@@ -60,7 +60,8 @@ add_subdirectory( pop3 )
 
 if( LibKGAPI2_FOUND )
   add_subdirectory( google )
-  add_subdirectory( gmail )
+  # Disabled in KDE 4.14 - too many issues for stable release
+  #add_subdirectory( gmail )
 endif()
 
 if( LibKFbAPI_FOUND )