CMake: Use #cmakedefine01 for APU_USE_EXPAT, APU_USE_LIBXML2 and APU_… #636

Job	Run time
Default	3m 52s
Static	3m 48s
Maintainer-mode	3m 49s
Named SHM - SysV, Maintainer-mode	3m 52s
Named SHM - Classic mmap, Maintainer-mode	3m 51s
Pool-debug	3m 53s
Pool-debug, maintainer-mode	3m 55s
Thread-debug, maintainer-mode	3m 48s
Maintainer-mode, no IPv6	4m 4s
Maintainer-mode, -Werror	3m 49s
With crypto	3m 51s
ASan	4m 9s
ASan, pool-debug	4m 10s
UBsan	4m 4s
LMDB	4m 0s
Berkeley DB v5.3	4m 8s
	1h 3m 3s

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