2013-11-22  Chirayu Desai  <chirayudesai1@gmail.com>

	* libc/include/sys/unistd.h (readlink): Add restrict keyword.
	(readlinkat): Ditto.
	(swab): Ditto.
	* libc/sys/rdos/readlink.c (readlink): Ditto.
	* libc/string/swab.c (swab): Ditto.