adb: make adb_basename match the POSIX behavior.

Previously, adb_basename was behaving according to the GNU, POSIX-incompatible
basename, despite POSIX adb_dirname existing alongside it. This patch changes
adb_basename to pass through to the POSIX basename.

Bug: http://b/25456821
Change-Id: I62a4865cccf3b9cdbc112e3e53ff475aa4a23bd9
2 files changed