[5.4][SwiftShims] Make the arguments of memcmp nullable on Darwin#37626

Merged

xymus merged 2 commits intoswiftlang:release/5.4from

xymus:fix-memcmp-definition-5.4

May 25, 2021

Commits on May 25, 2021

[SwiftShims] Make the void* arguments of memcmp _Nullable on Darwin
xymus
committed
[Tests] memcmp-definitions should run only on Apple plaftorms
xymus
committed