Store the value from BOARD_CUSTOM_BOOTIMG_MK to a file

This is needed so it can be read in when re-signing a package to
use the proper boot image.

Print notice when using a custom bootimage makefile

Change-Id: I6baab9f8964ce5d4fa9487f2859af9c385d7b21b
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