[Bug lto/82229] GCC7's LTO underperforms compared to GCC6

[krzysio.kurek at wp dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82229

--- Comment #7 from krzysio.kurek at wp dot pl ---
I've created a fork with "devel" branch here:
https://github.com/kiroma/Empire/tree/devel
I've tweaked some things, so now random seed is set, the simulation will exit
after 250 iterations and after exiting it will output to console average fps
for the whole run.