[cmake-developers] fix-OSX-bundle-rpaths-and-Qt5 topic

[Adam Strzelecki]

> Sure, I think it would be good to require 10.6.
> We also have uses of the -delete_rpath/-add_rpath parameters in cmInstallTargetGenerator.cxx, and the test of that already requires 10.6 or greater.

Moreover I believe nobody nowadays builds for 10.5 on 10.5. Since 10.6 with Xcode 3 supports 10.5 PPC and Apple allows virtualization of 10.6 Server, so if anyone still targets PPC on 10.5 or earlier then 10.6 is natural choice.

--Adam