hackdoc: link to cs instead of gitweb

Change-Id: Ifca7a63517bceffe7ccc0452474d9d16626486de
diff --git a/devtools/hackdoc/source/source_local.go b/devtools/hackdoc/source/source_local.go
index feecd8b..e901f45 100644
--- a/devtools/hackdoc/source/source_local.go
+++ b/devtools/hackdoc/source/source_local.go
@@ -72,6 +72,6 @@
 func (s *LocalSource) WebLinks(fpath string) []WebLink {
 	gitURL := fmt.Sprintf(FlagGitwebURLPattern, "master", fpath)
 	return []WebLink{
-		WebLink{Kind: "gitweb", LinkLabel: "master", LinkURL: gitURL},
+		WebLink{Kind: "source", LinkLabel: "master", LinkURL: gitURL},
 	}
 }