cmake _MK_HAVE_STRTOLL examples

JulNadeauCA/libagar CMakeChecks.cmake :3182

check_c_source_compiles("
#include <stdlib.h>

int
main(int argc, char *argv[])
{
	long long int lli;
	char *ep = NULL;
	char *foo = \"1234\";

	lli = strtoll(foo, &ep, 10);
	return (lli != 0);
}
" _MK_HAVE_STRTOLL)