Fix return type of print_error function

Summary:
* Small fix noticed while preparing previous diff
* One of the clauses return `skip`

Reviewed By: jcpetruzza

Differential Revision: D70784089

fbshipit-source-id: 06c65bdf192411e694b14df83124e1193be37dd1

Author: bgsmeta

erlang/common_test/test_exec/src/ct_daemon_printer.erl

@@ -29,7 +29,7 @@ print_summary(Total, Passed, FailedOrSkipped) ->
     io:format("~ts/~ts Failed or Skipped: ~b~n", [?CROSS_MARK, ?SKIP_MARK, FailedOrSkipped]).
 
 -spec print_result(string(), ct_daemon_core:run_result() | ct_daemon_runner:discover_error()) ->
-    ok | fail.
+    ok | fail | skip.
 print_result(Name, pass_result) ->
     io:format("~ts ~ts~n", [?CHECK_MARK, Name]);
 print_result(Name, {fail, {TestId, {end_per_testcase, E}}}) ->