Add Jose.
diff --git a/third_party/SermoDigital/jose/README.google b/third_party/SermoDigital/jose/README.google
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+jose is a set of libraries for JWT and other kind of crypto stuff
+in Go (but it does not contain implementations of crypto algorithms
+itself!). It is MIT licensed.
+
+URL: https://github.com/SermoDigital/jose.git
+