Merge pull request #108 from fadushin/logger_test_fix

The AVM logger module is by design asynchronous.
This change adds a sleep to the retrieval of the counted logs to wait for the
logger sink to be invoked, and hence the counter to be updated.

These changes are made under the terms of the LGPL v2.1 (or any later version)
and Apache 2.0 licenses.

tests/libs/eavmlib/test_logger.erl

@@ -74,6 +74,7 @@ increment_counter(Level) ->
     Pid ! {increment, Level}.
 
 get_counter(Level) ->
+    ?TIMER:sleep(50),
     Pid = erlang:whereis(counter),
     Ref = erlang:make_ref(),
     Pid ! {self(), Ref, get_counter, Level},