Reorganized sys functions

lib/sys/mem_linux.q

@@ -0,0 +1,7 @@
+mmap(address Int, length Int, protection Int, flags Int) -> Pointer {
+	return syscall(9, address, length, protection, flags)
+}
+
+munmap(address Pointer, length Int) -> Int {
+	return syscall(11, address, length)
+}