[node] Enable npm to build mapbox-gl-native package from source

- Allow node bindings to be built if git submodules cannot be checked out
 - Made geojsonvt a mason package instead of a git submodule
 - Use globally installed mason if it cannot be checked out via git submodules

scripts/android/configure.sh

@@ -8,5 +8,7 @@ LIBUV_VERSION=1.4.0
 ZLIB_VERSION=system
 NUNICODE_VERSION=1.5.1
 LIBZIP_VERSION=0.11.2
+GEOJSONVT_VERSION=1.1.0
+VARIANT_VERSION=1.0
 
 export MASON_ANDROID_ABI=${MASON_PLATFORM_VERSION}