Add an explicit "uri" to the "harbormaster.buildable.search" results

Summary: Ref T13546. This makes some "arc" tasks a little easier, and will make them more correct if "arc" ever switches to using SSH.

Test Plan: Ran "harbormaster.buildable.search" from the web UI, saw URIs in the result set.

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13546

Differential Revision: https://secure.phabricator.com/D21346

src/applications/harbormaster/storage/HarbormasterBuildable.php

@@ -366,6 +366,10 @@ final class HarbormasterBuildable
         ->setKey('isManual')
         ->setType('bool')
         ->setDescription(pht('True if this is a manual buildable.')),
+      id(new PhabricatorConduitSearchFieldSpecification())
+        ->setKey('uri')
+        ->setType('uri')
+        ->setDescription(pht('View URI for the buildable.')),
     );
   }
 
@@ -377,6 +381,7 @@ final class HarbormasterBuildable
         'value' => $this->getBuildableStatus(),
       ),
       'isManual' => (bool)$this->getIsManualBuildable(),
+      'uri' => PhabricatorEnv::getURI($this->getURI()),
     );
   }