Import the Mendel Linux GKE signing pubkey.

Change-Id: If36f317eb75a3c84eb9c1e09ee5226bec5aba722
diff --git a/Makefile b/Makefile
index c1970d9..a1bb8bf 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-mendel-keyring.gpg: cloud-key.gpg linux_signing_key.pub
+mendel-keyring.gpg: cloud-key.gpg linux_signing_key.pub mendel-pubkey.gpg
 	gpg --no-keyring --import-options import-export --import $^ > $@
 
 build: mendel-keyring.gpg
diff --git a/mendel-pubkey.gpg b/mendel-pubkey.gpg
new file mode 100644
index 0000000..b8e8a2f
--- /dev/null
+++ b/mendel-pubkey.gpg
Binary files differ