[yocto] Change in behaviour

[Gary Thomas]

This commit:
   commit 536b73f55f51fcea555338f9a557fe86c09d00cb
   Author: Richard Purdie <richard.purdie at linuxfoundation.org>
   Date:   Sun Oct 11 10:21:20 2015 +0100
     bitbake: data_smart: Only support lowercase OVERRIDES
breaks the use of capital letters, specifically in MACHINE names.
I use this a lot, along with COMPATIBLE_MACHINE, to share recipes
amongst similar machines.

The commit says it could be conditional.  How hard (and how)
would it be to do that?

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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