[libvirt] [libvirt-glib] [PATCH] spec: Enable unit tests during build

[mkasik at redhat.com]

Hi,

libvirt-glib has unit tests which can be evaluated as a part of build of RPM.
It is generally recommended to run these tests so that some problems can be
cought soon enough before the package gets to the users.
Please, enable these tests for libvirt-glib.

I've done scratch-build of this in koji and the build passes as well
as the tests.