The commit that bumped the autotools version was reverted, so lets
revert the meson version to match.
fixes: 1f2640bfa940362c7550cdd065d37555f21c8ae8
"Revert "winsys/amdgpu: Add R600_DEBUG flag to reserve VMID per ctx."" Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com> Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>