urushi: some cleanup

* Fixed incorrect build fingerprint
* Added & fixed some comments to the source files
* Reorganized alphabetically proprietary files list
* recovery.fstab: convert tabs to spaces
* Move gsm feature xml to mogami-common

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I2657c0630059ba27d85b9a22e40d6365b9ddbdc4