update change logs

Change-Id: I04b111e6abab5fca130d170fbe2ef898b548c137
Preserve Xposed Framework Files

This will Preserve Xposed Framework Files (/system/bin/app_process) while installing so that users dont have to reinstall it everytime they flash a nightly.

Change-Id: I221e64236f93d498042fc6dd0b5852200bf4a379
update to v1.2.1

Change-Id: I302777c3876d3eaa8fb80fd528dd520ac3bacfe1
cleanup

Change-Id: I735052224f5bc5a75231d8d6d57118f5707abc4c