Allow devices to specify certain ro. props via TARGET_UNIFIED_DEVICE

This modifies buildinfo.sh to not set model, name, description, and
fingerprint in build.prop. These can then be set via custom init
lib.
This also fixes ota_from_target_files to function without these
props being preset.

Change-Id: I945b2c38e60b207d2d0f82b34f4f230ac21b0657
Enable gesture typing - (3/3)-delete the libjni_latinime package in favour of prebuilt libjni_latinime

Change-Id: Id06777518f0d0e87aaeab8fb105224ae29ed9e77
Fixes for gcc 4.8/4.9

Change-Id: I498ab5fd5ef97b21e365dbcac6110eabaec5d289