gallium/xlib: Fix for recent gl_config changes

Fixes: #4544
35 jobs for !10050 with gallium-xlib-build-fix in 10 seconds (queued for 5 seconds)
detached
Status Job ID Name Coverage
  Sanity
passed #8575588
sanity

00:00:10

 
  Container
manual #8575591
aarch64 manual
arm_build
manual #8575592
windows shell 1809 mesa manual
windows_build_vs2019
manual #8575589
manual
x86_build-base
manual #8575590
manual
x86_test-base
 
  Container 2
created #8575600
android_build
created #8575597
i386_build
created #8575593
kernel+rootfs_amd64
created #8575594
aarch64
kernel+rootfs_arm64
created #8575603
aarch64
kernel+rootfs_arm64-baremetal
created #8575595
aarch64
kernel+rootfs_armhf
created #8575604
aarch64
kernel+rootfs_armhf-baremetal
created #8575598
ppc64el_build
created #8575599
s390x_build
created #8575596
x86_build
created #8575601
x86_test-gl
created #8575602
x86_test-vk
 
  Meson X86 64
created #8575610
meson-clang
created #8575611
meson-clover
created #8575607
meson-clover-testing
created #8575608
meson-gallium
created #8575609
meson-release
created #8575605
meson-testing
created #8575606
meson-testing-asan
created #8575612
meson-vulkan
 
  Build Misc
created #8575613
arm_test
created #8575614
meson-android
created #8575616
aarch64
meson-arm64
created #8575617
aarch64
meson-arm64-asan
created #8575618
aarch64
meson-arm64-build-test
created #8575615
aarch64
meson-armhf
created #8575619
meson-i386
created #8575622
meson-mingw32-x86_64
created #8575621
kvm
meson-ppc64el
created #8575620
kvm
meson-s390x