Setup common tuna extract-files/remove Google self-extractors

Since tuna devices are no longer maintained by AOSP there is
no need to have multiple locations and duplicate files. This
Will put all common files in vendor/samsung/tuna and device
specific ones in vendor/samsung/maguro.

Change-Id: If4fc5688c82da031993b49a6f74807f31df21a1d
Merge "Setup common tuna extract-files/remove Google self-extractors" into cm-11.0
Merge branch 'cm-11.0' into martincz