Change afl hang timeout from 1000+ to 5000+ (#2252)
Change afl hang timeout from 1000+ to 5000+ (#2252)

Some targets can be slow, so need higher timeout, like 5 sec.
1000+ or 1 sec is not enough as all inputs in a corpus can
hang on a slow target and then afl-fuzz will crash. So, 5 sec
seems to work well.
google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz