Bump the timeout a little
Bump the timeout a little

This is actually a bug in benchable (#299), as it uncompresses the
build for every iteration (instead of uncompressing just once). Old
revisions (e.g. 2015.12^) are now in long-term storage mode, so it
takes more time. Bumping the timeout just a little bit (10s is
default) makes the test pass.

perl6/whateverable,perl6/whateverable,MasterDuke17/whateverable,perl6/whateverable