THRIFT-4358: add unix domain socket option to ruby cross tests
Client: rb

This closes #1513
diff --git a/test/crossrunner/report.py b/test/crossrunner/report.py
index 75f36db..5878222 100644
--- a/test/crossrunner/report.py
+++ b/test/crossrunner/report.py
@@ -158,6 +158,7 @@
         'client': list(map(re.compile, [
             '[Cc]onnection refused',
             'Could not connect to',
+            'Could not open UNIX ',       # domain socket (rb)
             'ECONNREFUSED',
             'econnrefused',               # erl
             'CONNECTION-REFUSED-ERROR',   # cl