android/x15-v2: fix the error on boot url specification

need to add '/' sign before boot_fit.img for the snapshot url
otherwise will get the error like here:
https://lkft.validation.linaro.org/scheduler/job/203283

Change-Id: If6a7ab7602850ccebbbc5820953bb00409a569fe
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
35 files changed
tree: 1c39c84317caf03adbff2ba32b599a533c1fafdc
  1. android/
  2. pm-qa/
  3. ubuntu/
  4. .gitreview
  5. merge-fragments.py
  6. README