tools/battor_agent: Adds battor_agent_unittests to waterfall

testing/buildbot/chromium.linux.json

Index: testing/buildbot/chromium.linux.json
diff --git a/testing/buildbot/chromium.linux.json b/testing/buildbot/chromium.linux.json
index b019fa5fd14422548341364ab3c60d3c582a3fd4..940e360a7f59227570d069ce791113a8649b9c79 100644
--- a/testing/buildbot/chromium.linux.json
+++ b/testing/buildbot/chromium.linux.json
@@ -352,6 +352,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "battor_agent_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "blimp_unittests"
       },
       {
@@ -777,6 +783,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "battor_agent_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "blimp_unittests"
       },
       {
@@ -1143,6 +1155,12 @@
       },
       {
         "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "battor_agent_unittests"
+      },
+      {
+        "swarming": {
           "can_use_on_swarming_builders": true,
           "shards": 10
         },