Changelog:
=========
-Protobuf News may include additional announcements or pre-announcements for
upcoming changes.
-Revert CopyFrom() optimization that was causing crashes back to
Serialize/Parse (protocolbuffers/upb@78e9694)
-Ruby: Fix object cache lookups on 32-bit platforms
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
