license: clarify the licensing for the project's metadata

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 <[email protected]>
Signed-off-by: Otavio Salvador <[email protected]>

COPYING.MIT

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+Permission is hereby granted, free of charge, to any person obtaining a copy 
+of this software and associated documentation files (the "Software"), to deal 
+in the Software without restriction, including without limitation the rights 
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+copies of the Software, and to permit persons to whom the Software is 
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in 
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+THE SOFTWARE.

LICENSE

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+Different components of meta-freescale are under different licenses (a mix
+of MIT and proprietary). Please see:
+
+COPYING.MIT (MIT)
+custom-licenses/* (Various EULAs, included by recipes)
+
+All metadata is MIT licensed unless otherwise stated. Source code and binaries
+included in tree for individual recipes are under the LICENSE stated in
+the associated recipe (.bb file) unless otherwise stated.
+
+License information for any other files is either explicitly stated
+or defaults to GPL version 2.