Explicitly enabling Vulkan

Author: Javernaut

scripts/ffmpeg/build.sh

@@ -43,6 +43,7 @@ DEP_LD_FLAGS="-L${BUILD_DIR_EXTERNAL}/${ANDROID_ABI}/lib $FFMPEG_EXTRA_LD_FLAGS"
   --extra-ldflags="$DEP_LD_FLAGS" \
   --enable-shared \
   --disable-static \
+  --enable-vulkan \
   --pkg-config=${PKG_CONFIG_EXECUTABLE} \
   ${EXTRA_BUILD_CONFIGURATION_FLAGS} \
   $ADDITIONAL_COMPONENTS || exit 1