manifest: Use refs/heads/release-R81-12871.B for chromiumos-overlay.

Prior to this cl, chromiumos-overlay was checked out at a specific
commit instead of refs/heads/release-R81-12871.B. This CL fixes
that problem so that local repo sync should include all the changes
checked into the branch.

BUG=b/175733030
TEST=none

Change-Id: I84f630420c2b7071a3cb60efb880af47d851984f
Reviewed-on: https://cos-review.googlesource.com/c/cos/manifest/+/9763
Reviewed-by: Saied Kazemi <saied@google.com>
Tested-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
1 file changed
tree: 841f817f270663bb64bb16c764f304fe96f99a63
  1. LICENSE
  2. PRESUBMIT.cfg
  3. README.md
  4. external_full.xml
README.md

Manifests used to checkout COS source

Usage: repo init -u https://cos.googlesource.com/cos/manifest.git && repo sync.