Provide link to developer's policy

llvm-svn: 140857
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 4f4d310e3e7c964e979f73807b970dd5dba64b1e
1 file changed