git-svn: don't output git commits in quiet mode

Ideally only errors should be output in this mode so fetch
can be run from cron and normally produce no output. Without
this change it would output a single line on each git commit,
e.g.
r1909 = 32ef87860662526d4a62f903949ed21e0341079e (u2_10_12_branch)

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Acked-by: Eric Wong <normalperson@yhbt.net>

git-svn.perl

@@ -2331,13 +2331,13 @@ sub do_git_commit {
 
 	$self->{last_rev} = $log_entry->{revision};
 	$self->{last_commit} = $commit;
-	print "r$log_entry->{revision}";
+	print "r$log_entry->{revision}" unless $::_q;
 	if (defined $log_entry->{svm_revision}) {
-		 print " (\@$log_entry->{svm_revision})";
+		 print " (\@$log_entry->{svm_revision})" unless $::_q;
 		 $self->rev_map_set($log_entry->{svm_revision}, $commit,
 		                   0, $self->svm_uuid);
 	}
-	print " = $commit ($self->{ref_id})\n";
+	print " = $commit ($self->{ref_id})\n" unless $::_q;
 	if (--$_gc_nr == 0) {
 		$_gc_nr = $_gc_period;
 		gc();