Add Treasure Agent (#2908)

Treasure Agent a.k.a td-agent is a data colloector for Treasure Data and
which is also installer form of Fluentd.

Signed-off-by: Hiroshi Hatake <cosmo0920.oucc@gmail.com>

manifests/TreasureData/TDAgent/3.8.0.yaml

@@ -0,0 +1,18 @@
+Id: TreasureData.TDAgent
+Version: 3.8.0
+Name: Tresure Agent
+Publisher: Treasure Data Inc.
+License: Apache License 2.0
+LicenseUrl: https://www.apache.org/licenses/LICENSE-2.0
+AppMoniker: td-agent
+Tags: fluentd, logging
+Description: A data collector for Treasure Data.
+Homepage: https://www.fluentd.org
+Installers:
+  - Arch: x64
+    Url:  http://packages.treasuredata.com/3/windows/td-agent-3.8.0-0-x64.msi
+    Sha256: B08D65BB9563A4BA5167663619E8F38FB0DE92F3FE6C73DAD2BB5B3F75C58D8D
+    InstallerType: msi
+    Switches:
+      Silent: /quiet
+      SilentWithProgress: /passive