Flag -Wno-defaulted-function-deleted is not known to clang 4.0, which is
currently the default on many systems, so filter the flag for now.

R=mslekova@chromium.org

Notry: true
Change-Id: I9ee9cbbf97f411d409b8b4150897d7741abe24af
Reviewed-on: https://chromium-review.googlesource.com/c/1301511
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57033}