infra config: Add back the comment about how the OSX_SDK recipe works.

Relands only the comments that were added to our cr-buildbucket.cfg in
the reverted commit 1a5032f91662568ed3f. These comments are very useful
for helping us find where our build recipes are in the chromium //build
repo, and how everything comes together in the actual build on the bots.

There is no configuration or other functional change being made here.

TBR=jophba@chromium.org

Bug: openscreen:86
Change-Id: I8edbc8107d094525ad6881ba68a9ebbb0f337ab7
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/1992823
Reviewed-by: Yuri Wiitala <miu@chromium.org>

0 files changed, 0 insertions, 0 deletions