build: update virglrenderer (again)

Last commit broke Vulkan in App Sandbox and this fixes it.

Author: osy

patches/sources

@@ -46,7 +46,7 @@ EPOXY_COMMIT="5014658f79e4d6872a1ad6754da9098ccd9d4fc5"
 VULKAN_LOADER_REPO="https://github.com/osy/Vulkan-Loader.git"
 VULKAN_LOADER_COMMIT="6df86907be582927507637f3f6003ea58bc34517"
 VIRGLRENDERER_REPO="https://github.com/utmapp/virglrenderer.git"
-VIRGLRENDERER_COMMIT="287bf53c21bab885930f609f18b68b347a60fb86"
+VIRGLRENDERER_COMMIT="d48a2d0d9a722fffd3f92c83e71d9426a4892a66"
 MESA_REPO="https://gitlab.freedesktop.org/osy/mesa.git"
 MESA_COMMIT="79bc850d884a1307356ff61c017e58901b90c7e2"
 MOLTENVK_REPO="https://github.com/utmapp/MoltenVK.git"