minigbm: Compile with large file support

minigbm: Compile with large file support

On device with 32-bit userspace on 64-bit kernel we need to make
sure mmap64 is used to import buffer, or the call may fail because
of invalid offset.

BUG=None
TEST=Use libgbm to import drm_gralloc buffer on Elm.

Change-Id: I1b70d105e6f135d8fa534fb99cad266eed910ea9
Reviewed-on: https://chromium-review.googlesource.com/405147
Commit-Ready: Ricky Liang <jcliang@chromium.org>
Tested-by: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>