Own the generated files (as %ghosts)

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1486468

At least for this package.
For other packages, see https://lists.fedoraproject.org/archives/list/packaging@lists.fedoraproject.org/thread/Q3OC2JTNSTBJ55PI47BB3NNR2C56K33V/

shared-mime-info.spec

@@ -1,7 +1,7 @@
 Summary: Shared MIME information database
 Name: shared-mime-info
 Version: 2.0
-Release: 4%{?dist}
+Release: 5%{?dist}
 License: GPLv2+
 URL: http://freedesktop.org/Software/shared-mime-info
 Source0: https://gitlab.freedesktop.org/xdg/shared-mime-info/uploads/0440063a2e6823a4b1a6fb2f2af8350f/shared-mime-info-2.0.tar.xz
@@ -46,7 +46,9 @@ mv xdgmime-*/ xdgmime/
 cd ./xdgmime/
 make
 cd ..
-%meson -Dupdate-mimedb=false -Dxdg-mime-path=./xdgmime/
+# the updated mimedb is later owned as %%ghost to ensure proper file-ownership
+# it also asserts it is possible to build it
+%meson -Dupdate-mimedb=true -Dxdg-mime-path=./xdgmime/
 %meson_build
 
 %install
@@ -96,6 +98,10 @@ update-mime-database -n %{_datadir}/mime &> /dev/null ||:
 %{_datadir}/gettext/its/shared-mime-info.loc
 
 %changelog
+* Sun Nov  8 2020 Miro Hrončok <mhroncok@redhat.com> - 2.0-5
+- Own the generated files (as %%ghosts)
+- Fixes: rhbz#1486468
+
 * Tue Aug 25 2020 Bastien Nocera <bnocera@redhat.com> - 2.0-4
 + shared-mime-info-2.0-4
 - Remove GNOME specific defaults apps list, move to gnome-desktop3