[PATCH] D52524: Add -Wno-poison-system-directories flag

[Manoj Gupta via Phabricator via cfe-commits]

manojgupta added reviewers: rtrieu, aaron.ballman.
manojgupta added a comment.

Thanks,

Adding a few more reviewers since I am not very familiar with this part of clang.
Please also update the patch description as suggested by @thakis


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D52524/new/

https://reviews.llvm.org/D52524