Disable t8657 on OpenBSD. See issue #13760.

euantorano · euantorano · commit cf29a98506d6 · 2020-03-31T18:54:38.000+01:00
diff --git a/tests/exception/t9657.nim b/tests/exception/t9657.nim
@@ -2,6 +2,7 @@ discard """
   action: run
   exitcode: 1
   target: "c"
+  disabled: "openbsd"
 """
 # todo: remove `target: "c"` workaround once #10343 is properly fixed
 close stdmsg
