configure: update explicit check for glib : >= 2.22

configure: update explicit check for glib : >= 2.22

As of commit b3caef1f, we're using g_array_unref() in 'lib/query.cc',
which was only introduced in glib 2.22, so update the dependency.

Thanks to datapipe@gmail.com for reporting this [1].

Also see commit b88e6abc.

[1] id:"alpine.DEB.2.02.1201132130220.21970@ltspubuntu4.int.smq.datapipe.net"