The fact that the Local Yocto Project release does not provide any
compatible layers confuses people. Add a section about the local release
to explain what it does.
[YOCTO #9229]
(From yocto-docs rev: cc7ebcd5a66ff3041a7fdd17e697dfb60b08cadd)
Signed-off-by: Belen <belen@icarus.isw.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>