android x15-v2: update boot prompt

from shell@am57xevm: to am57xevm:

Change-Id: If0c848ba895dd0f9b033515d0dda7473becdb7bc
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
34 files changed
tree: d657a9f0d17a94e310b2a7ae89bbdbcae17b45cf
  1. android/
  2. pm-qa/
  3. ubuntu/
  4. .gitreview
  5. merge-fragments.py
  6. README