Don't built i386 for OS X
Don't built i386 for OS X

We don't support it in the Cocoa binding (it uses an older version of the obj-c
runtime that doesn't support most of the features added in the last decade or
so), so building it is just a waste of time.

realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core