st/dri/drm: Add a second libdridrm library
st/dri/drm: Add a second libdridrm library

Will be used to create the single dri target library, on our
way to convert all the dri targets during the conversion to
to static/shared pipe-drivers.

Signed-off-by: Emil Velikov <4c996f2f093ddd0585a556460b4cc3ba555546ef@gmail.com>
Tested-by: Rob Clark <6f78cdb10adbe0a7fbbf4098125a51f401c77a5f@freedesktop.org>
Tested-by: Thomas Helland <thomashelland90 at gmail.com>
Acked-by: Tom Stellard <85590917cb30a670bf23f5b4273617f8815d1e87@amd.com>

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