spec: Port cleanups from Fedora

Port cleanups from Fedora:

Igor Gnatenko <ignatenkobrain@fedoraproject.org>
 - Switching to %ldconfig_scriptlets
 - Fixing the licence directory specs
 - Removing unneeded %defattr specs
 - Escaping macros in changelogs
 - Remove buildroot definition and deletion

Peter Robinson <pbrobinson@gmail.com>
 - Add explicit gcc requirement
 - Remove Group specs

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Igor Gnatenko <ignatenkobrain@fedoraproject.org>
cc: Peter Robinson <pbrobinson@gmail.com>
1 file changed