Update wipe data to recognize .one_confirm or .no_confirm files in the clockworkmod folder.

This commit allows the wipe data/factory reset option to recognize the .one_confirm or .no_confirm files in the clockworkmod folder.  

This also correctly mounts the /sdcard to verify the presence of the .nomedia
or .one_confirm in certain circumstances when the /sdcard is not
automatically mounted during bootup into cwm.

Change-Id: I88c039801e621edf9e8780f70c34fb7a1f48e51c