Increase the timeout on dictionary tests to accommodate slower machines.

--- netsurf-3.6/test/hashtable.c
+++ netsurf-3.6/test/hashtable.c
@@ -286,6 +286,7 @@
 	tcase_add_checked_fixture(tc_dict_s,
 				  dicts_hashtable_create,
 				  dict_hashtable_teardown);
+	tcase_set_timeout(tc_dict_s, 30);
 
 	tcase_add_test(tc_dict_s, hashtable_dict_test);
 
@@ -297,6 +298,7 @@
 	tcase_add_checked_fixture(tc_dict_l,
 				  dictl_hashtable_create,
 				  dict_hashtable_teardown);
+	tcase_set_timeout(tc_dict_l, 30);
 
 	tcase_add_test(tc_dict_l, hashtable_dict_test);
 
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<tr><td><span title='2018-05-29 18:29:36 +0200'>2018-05-29</span></td><td><a href='/guix/commit/CODE-OF-CONDUCT?id=a076f19908d06b6df49f1c25c40de8838213cd71'>CODE-OF-CONDUCT: Switch to version 1.4 of the Contributor Covenant.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>