fix debuginfo check and logfile name

builder/kojid

@@ -5267,7 +5267,7 @@ class createDistRepoTask(BaseTaskHandler):
                     groupdata, oldpkgs=oldpkgs)
         if opts['split_debuginfo']:
             self.do_createrepo(debugdir, '%s/pkglist' % debugdir, None,
-                    oldpkgs=oldpkgs)
+                    oldpkgs=oldpkgs, logname='createrepo_debug')
         if len(self.kojipkgs) == 0:
             fo = file(os.path.join(datadir, "EMPTY_REPO"), 'w')
             fo.write("This repo is empty because its tag has no content for this arch\n")
@@ -5582,7 +5582,7 @@ enabled=1
         for bnp in self.kojipkgs:
             rpminfo = self.kojipkgs[bnp]
             bnplet = bnp[0].lower()
-            if opts['split_debuginfo'] and rpminfo.get('_multilib'):
+            if opts['split_debuginfo'] and koji.is_debuginfo(rpminfo['name']):
                 # note the ../
                 debug_pkgs.append('../%s/%s\n' % (bnplet, bnp))
             else: