Fix minor bugs in ojluni_refresh_files.py

1. Remove the extra space in the commit message
2. Halt the script immediately if it doesn't run on expected_upstream
  branch

Bug: 111603149
Test: ojluni_refresh_files
Change-Id: Id01c0e470703475687fffd8dc576f90b6cfbf599
1 file changed
tree: 47b9a7a85bfe7a2fa4499d80b8d22cd646cc923a
  1. ojluni/
  2. tools/
  3. EXPECTED_UPSTREAM