2-architecture +universal variants please (was: Re: [32999] trunk/base/ChangeLog)

[Anders F Björklund]

> It's OK to build 64-bit universals if desired, but it should not be 
> the default and it should be configurable - and if it builds 32-bit 
> binaries without +universal, it should build with it too.

Also, it would be more "universal" if it was to use the 10.4u SDK on 
Leopard too, since then the generated binaries would work on Tiger in 
addition. (currently it uses the 10.5 SDK if available)

--anders