[7u6] Request for approval: 7154130 : Update build readme to include OS X Lion instructions

[Edvard Wendelin]

Requesting approval to commit fix for CR 7154130.
Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7154130
Webrev: http://cr.openjdk.java.net/~ewendeli/7154130/webrev.01/

This had been reviewed on the build mailinglist. [1]

This fix has been pushed into jdk8 [2]

Kind regards,
Edvard Wendelin

[1] http://mail.openjdk.java.net/pipermail/build-dev/2012-April/006044.html
[2] http://hg.openjdk.java.net/jdk8/build/rev/2f06b15e2439