SConstruct : Fix GafferAppleseed compilation on Apple silicon
SConstruct : Fix GafferAppleseed compilation on Apple silicon

johnhaddon/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer