Makefile: support lto on mingw, default to 64bits
[stockfish] / tests /
drwxr-xr-x   ..
-rwxr-xr-x 3142 instrumented.sh
-rwxr-xr-x 1068 perft.sh
-rwxr-xr-x 1277 reprosearch.sh
-rwxr-xr-x 766 signature.sh