Upgrade to libdrm 2.4.30.

This is going to be necessary next time we upgrade mesa, this is also
necessary to work with mesa git against the Chrome OS tree.

TEST=manual:gfx regression checklist

Change-Id: Ibe38a048d40ad0c36040cb1d18eac5534d4d8f9c
Reviewed-on: https://gerrit.chromium.org/gerrit/14844
Commit-Ready: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Stéphane Marchesin <marcheu@chromium.org>
Reviewed-by: Stuart Abercrombie <sabercrombie@chromium.org>
(cherry picked from commit ebada83c0e8222b22280f86d0cf7fc7d17508132)
Reviewed-on: https://gerrit.chromium.org/gerrit/15614
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Sam Leffler <sleffler@chromium.org>
2 files changed