automake: use shared llvm libs for make distcheck

Cc: "12.0 13.0" <mesa-dev@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
diff --git a/Makefile.am b/Makefile.am
index 71030f2..4f2e698 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -40,7 +40,7 @@
 	--enable-vdpau \
 	--enable-xa \
 	--enable-xvmc \
-	--disable-llvm-shared-libs \
+	--enable-llvm-shared-libs \
 	--with-egl-platforms=x11,wayland,drm,surfaceless \
 	--with-dri-drivers=i915,i965,nouveau,radeon,r200,swrast \
 	--with-gallium-drivers=i915,ilo,nouveau,r300,r600,radeonsi,freedreno,svga,swrast,vc4,virgl,swr,etnaviv,imx \