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

native_client_sdk/src/examples/hello_world_stdio/example.dsc

 {
   'TOOLS': ['newlib', 'glibc'],
   'TARGETS': [
     {
       'NAME' : 'hello_world_stdio',
       'TYPE' : 'main',
       'SOURCES' : ['hello_world.c'],
       'LIBS': ['ppapi_main', 'nacl_io', 'ppapi_cpp', 'ppapi', 'pthread']
     }
   ],
   'DATA': [
     'example.js',
   ],
   'DEST': 'examples',
   'NAME': 'hello_world_stdio',
   'TITLE': 'Hello World STDIO.',
-  'DESC': """
-
-  The Hello World Stdio example is the simplest one in the SDK.  It uses the
-ppapi_main library which creates an Module and Instance, using default values
-to simplify setup and communication with the PPAPI system.  In addition, it
-uses the nacl_io library to remap IO to the Pepper API.  This
-simplifies IO by providing a standard blocking API and allowing STDERR to go to
-the JavaScript console by default.""",
-  'FOCUS': 'Basic HTML, JavaScript, Minimal App.',
   'GROUP': 'Tools'
 }