Added NaCl to the supported platforms list

README-platforms.txt

@@ -25,6 +25,7 @@ Platforms supported by volunteers
 Haiku - maintained by Axel Dörfler <axeld@pinc-software.de>
 PSP - maintained by 527721088@qq.com
 Pandora - maintained by Scott Smith <pickle136@sbcglobal.net>
+NaCl - maintained by Gabriel Jacobo <gabomdq@gmail.com>
 
 Platforms that need maintainers
 ===============================