travis: Add the v3d driver to the automake build.

Hopefully this reduces the number of fixup commits we need for the
automake build.

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

.travis.yml

@@ -159,7 +159,7 @@ matrix:
         - DRI_LOADERS="--disable-glx --disable-gbm --disable-egl"
         - DRI_DRIVERS=""
         - GALLIUM_ST="--enable-dri --disable-opencl --disable-xa --disable-nine --disable-xvmc --disable-vdpau --disable-va --disable-omx-bellagio --disable-gallium-osmesa"
-        - GALLIUM_DRIVERS="i915,nouveau,pl111,r300,r600,freedreno,svga,swrast,vc4,virgl,etnaviv,imx"
+        - GALLIUM_DRIVERS="i915,nouveau,pl111,r300,r600,freedreno,svga,swrast,v3d,vc4,virgl,etnaviv,imx"
         - VULKAN_DRIVERS=""
         - LIBUNWIND_FLAGS="--enable-libunwind"
       addons: