Added git-hash-metrics builder and recipe

scripts/slave/recipes/infra/git_hash_metric.expected/infra.json

Index: scripts/slave/recipes/infra/git_hash_metric.expected/infra.json
diff --git a/scripts/slave/recipes/infra/git_hash_metric.expected/infra.json b/scripts/slave/recipes/infra/git_hash_metric.expected/infra.json
new file mode 100644
index 0000000000000000000000000000000000000000..05346951483770f7c1f088772d23152df5a009a6
--- /dev/null
+++ b/scripts/slave/recipes/infra/git_hash_metric.expected/infra.json
@@ -0,0 +1,21 @@
+[
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "/opt/infra-python/run.py",
+      "infra.tools.send_ts_mon_values",
+      "--verbose",
+      "--ts-mon-target-type=task",
+      "--ts-mon-task-service-name=git_hash_metric",
+      "--gauge='{\"name\":\"repository/hash\", \"value\": \"deadbeefdeadbeefdeadbeefdeadbeefdeadbeef\", \"repository\": \"https://chromium.googlesource.com/infra/infra\"}'"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "send hash to ts_mon"
+  },
+  {
+    "name": "$result",
+    "recipe_result": null,
+    "status_code": 0
+  }
+]