Extend loop limit by 1.
Job #889797 failed for 46c4e5d9:
Extend the loop count by 1 to account for non-exact timing in usleep(100000).
[==========] Running 6 test(s).
[ RUN ] getoriginnode_test
[ OK ] getoriginnode_test
[ RUN ] getsetservestalettl_test
[ OK ] getsetservestalettl_test
[ RUN ] dns_dbfind_staleok_test
21 is not within the range 0-20
db_test.c:214: error: Failure!
[ FAILED ] dns_dbfind_staleok_test
[ RUN ] class_test
[ OK ] class_test
[ RUN ] dbtype_test
[ OK ] dbtype_test
[ RUN ] version_test
[ OK ] version_test
[==========] 6 test(s) run.
[ PASSED ] 5 test(s).
[ FAILED ] 1 test(s), listed below:
[ FAILED ] dns_dbfind_staleok_test
1 FAILED TEST(S)
FAIL db_test (exit status: 1)