tree c5d5778cd617d8d60231cebf87f16527a7f47313
parent 58f2132bc3954fc704787d477500a209eedb8e29
author Captain Throwback <captainthrowback@gmail.com> 1532700324 -0400
committer Captain Throwback <captainthrowback@hotmail.com> 1535129265 -0400

twrp: use ANDROID_ROOT environment variable

instead of hard-coded /system path

I updated most of the references I found,
but there might be more

For devices that have to mount system at /system_root,
this allows system to be bind mounted to /system
and detected properly by TWRP

Change-Id: I9f142fd8cec392f5b88e95476258dab9c21a9aac