Pull the ObjC fixes from #6679 to the 3.10.x branch#6681

Merged

TeBoring merged 2 commits intoprotocolbuffers:3.10.xfrom thomasvl:objc_fix2

Sep 20, 2019

+26-14

Commits on Sep 20, 2019

[ObjC] Don't use unions and instead use memcpy for the type swaps. (protocolbuffers#6672 )
thomasvl
committed
Remove OSReadLittle* due to alignment requirements (protocolbuffers#6678 )

dmaclach
authored and
thomasvl
committed