Tar built for API 21 branch doesn't work well in certain cases and following error
may occur:
tar: ./share/doc/ed/LICENSE: Cannot change mode to rwx------: No such file or directory
tar: Exiting with failure status due to previous errors
Using bsdtar instead for extracting.
Partial compatibility for on-device builds.
There is no guarantee that it will be possible to build all available
packages and built packages will have same reliability that cross-compiled
but should solve "self-hosting" problems as much as possible.