[NaCl SDK] Make the SDK examples buildable as a packaged app.

native_client_sdk/src/examples/mouselock/example.dsc

 {
   'TOOLS': ['newlib', 'glibc', 'pnacl', 'win', 'linux'],
   'TARGETS': [
     {
       'NAME' : 'mouselock',
       'TYPE' : 'main',
       'SOURCES' : ['mouselock.cc', 'mouselock.h'],
       'LIBS': ['ppapi_cpp', 'ppapi', 'pthread']
     }
   ],
   'DEST': 'examples',
   'NAME': 'mouselock',
   'TITLE': 'Mouse Lock',
-  'DESC': """
-The Mouselock example demonstrates how to use the MouseLock API to hide
-the mouse cursor.  Mouse lock is only available in full-screen mode.  You can
-lock and unlock the mouse while in full-screen mode by pressing the Enter key.
-""",
-  'FOCUS': 'Mouse lock, Full-screen.',
   'GROUP': 'Concepts'
 }