d3d12: do not expose any shader-buffers

When we expose this without exposing SSBOs, gallium gets confused and
tries to use SSBOs for atomic operations, even if we explicitly suppory
zero buffers.
25 jobs for msclc-d3d12 in 6 minutes and 6 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Container
passed #5336782
aarch64
arm_build

00:00:20

passed #5336783
aarch64
arm_test

00:00:20

passed #5336784
windows shell 1809 mesa
windows_build_vs2019

00:00:08

passed #5336778
x86_build

00:00:13

passed #5336781
x86_build_old

00:00:12

passed #5336779
x86_test-gl

00:00:12

passed #5336780
x86_test-vk

00:00:12

 
  Meson X86 64
passed #5336788
meson-clang

00:02:29

passed #5336787
meson-classic

00:01:28

passed #5336789
meson-clover

00:04:34

passed #5336790
meson-clover-old-llvm

00:03:11

passed #5336786
meson-gallium

00:02:30

passed #5336785
meson-testing

00:01:34

passed #5336791
meson-vulkan

00:01:29

 
  Scons
passed #5336792
scons-win64

00:04:14

 
  Meson Misc
passed #5336794
aarch64
meson-arm64

00:02:13

passed #5336795
aarch64
meson-arm64-build-test

00:02:04

passed #5336793
aarch64
meson-armhf

00:02:12

passed #5336797
meson-i386

00:02:38

passed #5336800
meson-mingw32-x86_64

00:02:29

passed #5336799
kvm
meson-ppc64el

00:05:36

passed #5336798
kvm
meson-s390x

00:05:48

passed #5336796
windows docker 1809 mesa
meson-windows-vs2019

00:03:30

 
  Radv
manual #5336802
polaris10 manual
radv-polaris10-traces
manual #5336801
polaris10 manual
radv_polaris10_vkcts