Header generating action needs to be in public_deps if generated header is included from header file in the targets depending on the action target.

See below reference for more details.
https://gn.googlesource.com/gn/+/master/docs/reference.md#var_public_deps

Bug: chromium:931596
Change-Id: I198d9e09b8585b213ec4b375f10aecc6268f3bdd
Reviewed-on: https://chromium-review.googlesource.com/c/1469545Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59579}