cmake HAVE_DB4 examples

JulNadeauCA/libagar CMakeChecks.cmake :940 

check_c_source_compiles("
#ifdef __FreeBSD__
# include <db18/db.h>
#else
# include <db.h>
#endif

int main(int argc, char *argv[]) {
	DB *db;
	db_create(&db, NULL, 0);
	return (0);
}
" HAVE_DB4)

JulNadeauCA/libagar CMakeChecks.cmake :968 

check_c_source_compiles("
#ifdef __FreeBSD__
# include <db18/db.h>
#else
# include <db.h>
#endif

int main(int argc, char *argv[]) {
	DB *db;
	db_create(&db, NULL, 0);
	return (0);
}
" HAVE_DB4)