Xcode Build System Updates

This PR:

Adds a xnu_build.zsh script for Xcode Projects
- Does not includeRefIccMAXCmm or wxProfileDump as those Projects are non-trivial to Refactor.
Cleanup Xcode Projects

./xnu_build.zsh | grep "BUILD"

** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **
** BUILD SUCCEEDED **

InternationalColorConsortium / DemoIccMAX

Xcode Build System Updates #72