Presently, the recipe files in meta-freescale are under an ambiguous
license. There is a EULA file at the root, but it's clearly not meant
to apply as the default license as it is only explicitly called out in
a few recipes and mirrors the language of the LSDK. The yocto upstream
projects are meant to be distributed under a more liberal license than
the LSDK.

There are several licenses listed is custom-licenses/, but those again
only apply to specific recipes (e.g. NXP-Binary-EULA).

The license for the recipes themselves (and for the layer metadata, etc.)
is not clear and is problematic when attempting to host a mirror of this
code. So, add a LICENSE file that describes this situation, and provide
a reference copy of the MIT license (taken from poky/meta/).

Signed-off-by: Dima Zavin <dmitriyz@waymo.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>