Revert "Use foreach() and SAMPGDK_HEADERS to install headers"
Revert "Use foreach() and SAMPGDK_HEADERS to install headers"

This reverts commit 7b5895ab9280016e6eaa89fae6745d874f94ee08.

Conflicts:
	CMakeLists.txt

Zeex/sampgdk,WopsS/sampgdk,Zeex/sampgdk,WopsS/sampgdk,Zeex/sampgdk,WopsS/sampgdk