accept multiple kernel config fragments per kernel version

The Android kernel config fragment was recently broken up to factor out
architecture-specific config options. This means it is necessary to
accept two config fragments per kernel version. Multiple config
fragments may now be passed to the --kernel option, they are to be
separated by ':' characters.

Test: test vintf compatibility with and without compliant arch-specific
      kernel features
Bug: 64124223
Change-Id: Ie2d1490106d2020309458db6adbc99628651eb7e
1 file changed