We are already using 5.4 target as a workaround for missing
LC_DYLD_CHAINED_FIXUPS support in reflection tools, but we need to
further workaround a linker bug in older versions of ld-prime that
caused appletv simulator platform to be misidentified and use chained
fixups earlier than it should, so move back to 5.2.
Existing code does not visit such declarations and does not mark them to be preserved in the binary even if not public and used.
Resolves rdar://127903662