Explicitely mention --disable-gio in distro-configs/LibreOfficeLinux.conf

AFAIK, we could not use GIO for the release builds because they are built
on too old system. GIO has got enabled by default but it can't be used together
with GNOME VFS, so we need to explicitely disable it here.

Change-Id: Ic5e64b0b5a7c000b9add2892a18bbc963ea2b900

distro-configs/LibreOfficeLinux.conf

@@ -37,6 +37,7 @@
 --enable-epm
 --enable-python=internal
 --enable-online-update
+--disable-gio
 --disable-unix-qstart-libpng
 --disable-randr-link
 --disable-kde4