deps: add new clause of format_source function

Function format_source in rebar_deps.erl will fail on sources
like {rsync, Path} or {hg, URL} in rebar.config.
Add new function clause to match such source types.

THANKS

@@ -127,4 +127,5 @@ alisdair sullivan
 Alexander Verbitsky
 Andras Horvath
 Drew Varner
-Roberto Aloi
+Roberto Aloi
+Pavel Baturko

src/rebar_deps.erl

@@ -816,5 +816,7 @@ format_source(App, {git, Url, {tag, Tag}}) ->
     ?FMT("~p TAG ~s ~s", [App, Tag, Url]);
 format_source(App, {_, Url, Rev}) ->
     ?FMT("~p REV ~s ~s", [App, Rev, Url]);
+format_source(App, {SrcType, Url}) ->
+    ?FMT("~p ~p ~s", [App, SrcType, Url]);
 format_source(App, undefined) ->
     ?FMT("~p", [App]).