cmake HAVE_SYS_CAPSICUM_H examples

CTSRD-CHERI/cheribsd contrib/tcpdump/CMakeLists.txt :1018 

check_include_files("sys/capsicum.h" HAVE_SYS_CAPSICUM_H)

CTSRD-CHERI/cheribsd contrib/tcpdump/CMakeLists.txt :1047 

endif(HAVE_SYS_CAPSICUM_H)