Add a test case to exercise the detection of git-lfs repositories and the
behaviour of the lfs parameter.
(Bitbake rev: a7cf4fc72cce357c425084dc2c5f35b5ed1a4b7b)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>