subversion: extend for nativesdk
For SDK environments where people still use subversion, let it easily being
added to buildtools-tarball to invite more developers relying on Yocto
based SDKs without much requirement to setup anything on the development
workplace.
Signed-off-by: Jens Rehsack <sno@netbsd.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>