buildroot

freetype: legal-info: include docs/LICENSE.TXT

LICENSE.TXT gives an overview and explains in detail that freetype is dual
licensed under the FTL and GPLv2+, so also include it in the license files.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>