commit a05bf133aef384c3d129f73edc04f810caaa8a15
author John Koleszar <jkoleszar@google.com> Tue Feb 21 14:41:39 2012 -0800
committer Johann <johannkoenig@google.com> Fri Mar 16 14:38:51 2012 -0400
tree 2ed67118b36b1fc140767bf617b0170aa9e049c5
parent e68953b7c82396c5018d8d65b116a17050094151

Update XCode SDK search paths

Newer XCodes have moved the SDK path from /Developer/SDKs

Use a suggestion from jorgenisaksson@gmail.com to locate it

osx_sdk_dir is not required to be set. Apple now offers a set
command line tools which do not require this. isysroot is also
not required in newer versions of XCode so only set it when we
are confident in the location.

There remain issues with the iOS configure steps which will be
addressed later

Change-Id: I4f5d7e35175d0dea84faaa6bfb52a0153c72f84b