[libcxx] Set up .arcconfig to point to new Diffusion CXX repository

Authored by benhamilton on Dec 4 2017, 9:55 AM.


[libcxx] Set up .arcconfig to point to new Diffusion CXX repository

We want to automatically copy the appropriate mailing list
for review requests to the libc++ repository.

For context, see the proposal and discussion here:


Similar to D40179, I set up a new Diffusion repository with callsign
"CXX" for libc++:


This explicitly updates libcxx's .arcconfig to point to the new
CXX repository in Diffusion, which will let us use Herald rule H268.

Reviewers: halyavin, EricWF, mclow.lists, compnerd, mstorsjo

Reviewed By: compnerd

Subscribers: cfe-commits, bkramer, dlj, sammccall, klimek, smeenai, mstorsjo, krytarowski

Differential Revision: https://reviews.llvm.org/D40500

llvm-svn: 319666