[libc-commits] [libc] Replace python 3.9 dict | operator to support older python versions (PR #236599)

[Michael Jones via libc-commits]

https://github.com/michaelrj-google approved this pull request.

if this is really all it takes to support python 3.6 then LGTM. 

One nit: Please don't include @ me in the PR description because then every time someone makes a copy of this commit it sends me an email.

https://github.com/llvm/llvm-project/pull/236599