Update tracker-miners.spec to successfully build on RHEL and ELN
    
    The tracker-miners.spec already has a section in it to turn off certain dependencies not wanted in RHEL.

    But since the %build section was changed to use meson, it no longer builds correctly on RHEL.

    This change puts in the meson build statements to allow it to build on RHEL and ELN.

    We are setting up a secondary Rawhide build called ELN. In this compose, %{fedora} is unset and %{rhel} is set to "one higher than the most recently-released RHEL major version".

    

    Successful Fedora Rawhide scratch build:

    https://koji.fedoraproject.org/koji/taskinfo?taskID=44463079

    Successful Fedora ELN scratch build:

    https://koji.fedoraproject.org/koji/taskinfo?taskID=44462968

    

    Signed-off-by: Troy Dawson <tdawson@redhat.com>