intel-microcode: new package

The intel microcode is a proprietary package which provides a data file
used to correct processors errors.
It was originally sent by Richard Braun <rbraun@sceen.net>

[Peter: set _LICENSE_FILES]
Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Cc: Richard Braun <rbraun@sceen.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>