CMake: Remove /exports link flag for modules, because modules use #609

Job	Run time
Default	4m 0s
Static	3m 57s
Maintainer-mode	4m 1s
Named SHM - SysV, Maintainer-mode	3m 56s
Named SHM - Classic mmap, Maintainer-mode	4m 2s
Pool-debug	4m 1s
Pool-debug, maintainer-mode	4m 4s
Thread-debug, maintainer-mode	3m 42s
Maintainer-mode, no IPv6	3m 56s
Maintainer-mode, -Werror	4m 6s
With crypto	3m 59s
ASan	4m 13s
ASan, pool-debug	4m 45s
UBsan	4m 19s
LMDB	3m 58s
Berkeley DB v5.3	4m 25s
	1h 5m 24s

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