[codingtools] Made all scripts executables
[packages,*] Initial steps for Plugin modules on OSX to generate a 'bundle' not a dylib. However, a 'bundle' is not a single file, it's a proper Bundle, with resources etc, which is not automatically generated from non-Xcode builders, so this is currently disabled pending more work. The C.ILinkerOptions now does have a flag to identify plugins, even though the module ought to be sufficient