build: use some kind of optimization (-O2 ?) in git build
The current git repo darkplace does not see to get optimized when building which slows the git version down.
Loading of the map abyss was sped up by near 100% when compiling darksplace with -O3 in comparison to the default build (-O0?).
default build: 20.99s
-O3 build: 11.94
for benchmarking, I used ./all run +"map abyss ; quit"