[master] mention more local asio modifications

ext/asio/README

@@ -4,7 +4,18 @@ Downloaded from http://sourceforge.net/projects/asio/files
 Project page: http://think-async.com/Asio
 
 Local modifications:
+
+Imported a kqueue bug fix from Asio 1.5.1.
+git commit e4b2c2633ebb3859286e9a4c19e97e17bcac41b3
+See
+http://sourceforge.net/p/asio/git/ci/a50b53864f77fe762f21e44a281235982dd7e733/
+
 Added ASIO_DECL to a number of function definitions
 git commit c32718be9f5409b6f72d98ddcd0b1ccd4c5c2293
 See also the bug report at:
 http://sourceforge.net/tracker/?func=detail&aid=3291113&group_id=122478&atid=694037
+
+Imported a fix from Asio 1.5.2.
+git commit cf00216570a36d2e3e688b197deea781bfbe7d8d
+See
+http://sourceforge.net/p/asio/git/ci/4820fd6f0d257a6bb554fcd1f97f170330be0448/log/?path=/asio/include/asio/detail/impl/socket_ops.ipp