RFR: Increase test timeouts

[Roman Kennke]

I had to increase timeouts for EvilSyncBug and TestHeapDump to make them 
pass on aph's aarch64 box, which is not fast by itself, but has many 
cores which means jtreg test runner spawns many processes, which are 
probably slowing each other down.

http://cr.openjdk.java.net/~rkennke/testtimeouts/webrev.00/

I've chosen the values by experimenting and increasing them in 
minute-increments until all tests passed.

Ok?
Roman