fix source url for libgltf

libreoffice.spec

@@ -108,7 +108,7 @@ Source35:       %{external_url}/libetonyek-0.1.1.tar.bz2
 Source36:       %{external_url}/libfreehand-0.1.0.tar.bz2
 Source37:       %{external_url}/libabw-0.1.1.tar.bz2
 Source38:       %{external_url}/librevenge-0.0.2.tar.bz2
-Source39:       %{external_url}/libgltf-0.0.2.tar.bz2
+Source39:       %{external_url}/libgltf/libgltf-0.0.2.tar.bz2
 Source40:       %{external_url}/OpenCOLLADA-master-6509aa13af.tar.bz2
 Source41:       %{external_url}/libpagemaker-0.0.2.tar.bz2
 %global bundling_options %{?bundling_options} --without-system-libcmis --without-system-libcdr --without-system-libwpg --without-system-libwpd --without-system-libwps --without-system-libvisio --without-system-libmspub --without-system-libodfgen --without-system-libmwaw --without-system-libetonyek --without-system-libfreehand --without-system-libabw --without-system-librevenge --without-system-libgltf --without-system-opencollada --without-system-libpagemaker