tests: Revert back /bin/sh in shebang

This was added by mistake in commit ecd44e68
("tests: Remove bashisms (s/source/.)")

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>

diff --git a/testsuite/tests/ip/route/add_default_route.t b/testsuite/tests/ip/route/add_default_route.t
index 0b566f1f552b243de3d13b82d99bf21a989c64dd..569ba1f84cdc36d5d931c9bf80dde4eb13f2b490 100755 (executable)
--- a/testsuite/tests/ip/route/add_default_route.t
+++ b/testsuite/tests/ip/route/add_default_route.t
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 . lib/generic.sh