std::byte, when defined as an enum, needs to be given special treatment
with regards to its aliasing properties. An array of std::byte is
allowed to be used as storage for other types.
This fixes PR33916.
Differential Revision: https://reviews.llvm.org/D35824
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@309058 91177308-0d34-0410-b5e6-96231b3b80d8
David Majnemer