Add build option for ILP64 #87

Job	Run time
build_linux (3.14)	3m 14s
build_linux (3.11)	3m 28s
build_linux (3.10)	3m 30s
build_linux (3.13)	3m 30s
build_windows (3.12)	7m 40s
build_linux (3.12)	3m 36s
build_windows (3.14)	6m 14s
build_windows (3.10)	7m 29s
build_windows (3.11)	6m 58s
build_windows (3.13)	7m 0s
test_linux (3.11, false, ubuntu-latest)	1m 35s
test_linux (3.10, false, ubuntu-latest)	1m 17s
test_linux (3.12, false, ubuntu-latest)	1m 25s
test_linux (3.14, false, ubuntu-latest)	1m 14s
test_linux (3.13, false, ubuntu-latest)	1m 34s
test_windows (3.14, false, windows-latest)	3m 15s
test_windows (3.12, false, windows-latest)	4m 4s
test_windows (3.13, false, windows-latest)	3m 8s
test_windows (3.10, false, windows-latest)	3m 57s
test_windows (3.11, false, windows-latest)	3m 46s
	1h 17m 54s

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