Move binaries gitignore to top-level

Bug: 343199633
Change-Id: I3eb004ee14be07d5b648febb3e5a60ed40e8dc57
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/third_party/instrumented_libraries/+/5583329
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
2 files changed