android.cfg: support custom boot entry

New entries could also be appended by the new add_boot_entry function
in custom.cfg like

add_boot_entry /android-7.1-r2 "Android-x86 7.1-r2" quiet
1 file changed
tree: cc0ba6cc622c393a27700a81bb533a30da029914
  1. boot/
  2. editdisklbl/
  3. initrd/
  4. install/
  5. rpm/
  6. Android.mk
  7. CleanSpec.mk