build: temporarily carry dnf download --source alias patch

Until it merges upstream and makes it into a release.

This should fix the rawhide failure on:

https://github.com/coreos/fedora-coreos-config/blob/3fb482ecb20c1d9a774e6ed6b3f68ec6ab3e7623/ci/buildroot/install-buildroot.sh#L27

build

@@ -48,6 +48,14 @@ git clone https://github.com/coreos/rpm-ostree
   ci/install-test-deps.sh
 )
 
+# temporarily carry https://github.com/rpm-software-management/dnf5/pull/1485
+cat >> /usr/share/dnf5/aliases.d/compatibility.conf << EOF
+['download.source']
+type = 'cloned_named_arg'
+long_name = 'source'
+source = 'download.srpm'
+EOF
+
 # everything in the FCOS buildroot image
 git clone https://github.com/coreos/fedora-coreos-config
 (