zeus-common: Bring back stock BT firmware

* Also underp the file copying

Change-Id: Id835150bd2a736f7ff3ca041e3a25ad0e1516f6f
mango: Include satsuma firmware to fix touchscreen on some devices

Change-Id: I235de0aa2afe2f8fe5fb66a47868a383e20aa3b4
msm7x30: Cleanup duplicate blobs

These blobs are exactly the same for all devices:
* libaudioalsa
* chargemon & libmiscta

These blobs are exactly the same for mogami devices:
* nvimport & nv_param_loader

Unneeded blobs:
* nvcustomizer

Change-Id: I0f25063523c8a6721e1586edad154d2786f793f1