Specify full paths for scripts run inside the chroot.

Remove the assumption that the current directory is ~/trunk/src/scripts/
when the chroot is entered with cros_sdk.

BUG=chromium:429765
TEST=Ran build_chromeos.py, build_tc.py with the changes.

Change-Id: I9e54fda6b5f8ec8fe18b18cf67824c923a7e82e2
Reviewed-on: https://chrome-internal-review.googlesource.com/182270
Reviewed-by: Luis Lozano <llozano@chromium.org>
Commit-Queue: Rahul Chaudhry <rahulchaudhry@google.com>
Tested-by: Rahul Chaudhry <rahulchaudhry@google.com>
3 files changed