Add Birch.1 to vagrantfiles

vagrant/release/devstack/Vagrantfile

@@ -78,6 +78,9 @@ openedx_releases = {
   "named-release/birch" => {
     :name => "birch-devstack", :file => "20150224-birch-devstack.box",
   },
+  "named-release/birch.1" => {
+    :name => "birch-devstack-1", :file => "birch-1-devstack.box",
+  },
   "named-release/cypress.rc1" => {
     :name => "cypress-devstack-rc1", :file => "20150714-cypress-devstack-rc1.box",
   },

vagrant/release/fullstack/Vagrantfile

@@ -30,6 +30,9 @@ openedx_releases = {
   "named-release/birch" => {
     :name => "birch-fullstack", :file => "20150224-birch-fullstack.box",
   },
+  "named-release/birch.1" => {
+    :name => "birch-fullstack-1", :file => "birch-1-fullstack.box",
+  },
 }
 openedx_releases.default = {
   :name => "kifli-fullstack", :file => "20140826-kifli-fullstack.box"