message: Update common/metrics/build.rs
  Closes:
  Approved by: bmwill
diff: @@ -9,6 +9,6 @@ fn main() {
  .args(&["rev-parse", "--short", "HEAD"])
  .output()
  .unwrap();
  - let git_rev = &String::from_utf8(output.stdout).unwrap();
  + let git_rev = String::from_utf8(output.stdout).unwrap();
  println!("cargo:rustc-env=GIT_REVISION={}", git_rev);
  }
  