xf86drm: add GEM_CLOSE ioctl wrapper

We have wrappers for PRIME_HANDLE_TO_FD and PRIME_FD_TO_HANDLE,
but not for GEM_CLOSE. Add it so that callers don't need to
manually call drmIoctl.

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Daniel Stone <daniels@collabora.com>
6 jobs for main in 54 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Containers
passed debian #14031332

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  Build
passed meson-aarch64 #14031335

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passed meson-armhf #14031336

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passed meson-i386 #14031334

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passed meson-ppc64el #14031337

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passed meson-x86_64 #14031333

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