* (should) fix the compilation on Mac OS X (ecore_input)

 * (should) fix the compilation on Mac OS X (ecore_input)
 * better check of Cocoa.h

Patch by Andrew Wiliams and myself.

As I had to modify the patch so that it compiles on linux, could
the Mac OS X users check if the compilation is fine ?

Next steps:
 * change the name 'quartz' to 'cocoa'
 * add in ecore_cocoa all the needed functions to be used in ecore_evas
   (windows management, cursors, events, etc...) so that ecore_evas_cocoa.c
   does not contain objective c code anymore

git-svn-id: http://svn.enlightenment.org/svn/e/trunk/ecore@39915 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33