* Adding a temporarily exclusion for terrain gem materials and shaders when building on mac. This is a short term fix until either:
- there's a generic way to exclude assets based on platform
- materialtype assets can directly exclude certain platforms (or ignore excluded shaders)
- shader compiling for mac supports unbounded texture arrays.
Signed-off-by: Ken Pruiksma <pruiksma@amazon.com>
* moving setreg to gem and contraining to the exact files that are problematic
Signed-off-by: Ken Pruiksma <pruiksma@amazon.com>