[glibmm] tests/glibmm_tls_client: Skip test, if socket can't be connected

[Kjell Ahlstedt <kjellahl src gnome org>]

commit b7ec92f0980f8913e7ef53b605070eb9ebe7bee4
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Thu Dec 10 10:30:21 2020 +0100

    tests/glibmm_tls_client: Skip test, if socket can't be connected
    
    This test sometimes fails in CI runs, probably for a reason that's out
    of glibmm's control.

 tests/giomm_tls_client/main.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/tests/giomm_tls_client/main.cc b/tests/giomm_tls_client/main.cc
index 9ec2ea3c..bbbf56cf 100644
--- a/tests/giomm_tls_client/main.cc
+++ b/tests/giomm_tls_client/main.cc
@@ -101,7 +101,10 @@ main(int, char**)
     else
       std::cout << "Could not connect socket to " << address->get_address()->to_string() << ":"
                 << address->get_port() << ". Exception: " << ex.what() << std::endl;
-    return EXIT_FAILURE;
+
+    // When running CI (continuous integration), socket->connect(address)
+    // sometimes fails. Skip this test.
+    return 77;
   }
 
   if (!socket->is_connected())