It takes an expanded Background Music .pkg installer and repackages it
into a new .pkg installer. It's mainly useful for code signing, since
you have to expand the unsigned package, sign each of the bundles,
repackage it and then sign the new package.
Also, fix build_and_install.sh putting the BGMXPCHelper dSYMs in the
wrong archive.
Archiving is the standard way to build a release for distribution using
Xcode. package.sh now uses this option when it creates a release
package.
This change is mainly to keep the Run settings in the Xcode schemes from
affecting the release builds, which means we can commit the schemes with
more sensible settings.
Also, disable AddressSanitizer in the BGMDevice scheme, which was
stopping coreaudiod from launching because its sandbox won't allow the
process to load the AddressSanitizer dylib.
This is required to build against the macOS 10.14 SDK because 10.14
requires users to grant apps permission before they can use audio input
devices or send Apple Events to other apps.
I think builds built against the 10.13 SDK were supposed to continue
working, but I haven't tested it.
Note that without NSMicrophoneUsageDescription and
NSAppleEventsUsageDescription, 10.14 builds will fail more or less
silently when they try to use those features. (tccd does log a message
about it, though.)
See #163.
