Rename aiy-board-keyring to mendel-keyring

Change-Id: I1ef5ae108016ff63413077b9e6bfc70423086d50

mendel.xml

diff --git a/mendel.xml b/mendel.xml
index 3a061d3..b895545 100644
--- a/mendel.xml
+++ b/mendel.xml
@@ -23,12 +23,12 @@
 
     <!-- BEGIN Package repos -->
     <project path="packages/aiy-board-gadget" name="aiy-board-gadget" />
-    <project path="packages/aiy-board-keyring" name="aiy-board-keyring" />
     <project path="packages/aiy-board-tools" name="aiy-board-tools" />
     <project path="packages/aiy-board-tweaks" name="aiy-board-tweaks" />
     <project path="packages/base-files" name="base-files" />
     <project path="packages/mdt-services" name="mdt-services" />
     <project path="packages/mendel-distro-info-data" name="mendel-distro-info-data" />
+    <project path="packages/mendel-keyring" name="aiy-board-keyring" />
     <project path="packages/runonce" name="runonce" />
 
     <!-- END Package repos -->