Upgrade guice multibindings to match version used by Gerrit.

Package JSR305 annotation, because closure-templates depends on it but
Gerrit doesn't package it anymore, as it was replaced by own class, not
to interfere with J2EE containers, in [1].

[1] https://gerrit-review.googlesource.com/50112

Change-Id: I8f5fbdff0c45d3fc36e11314b27d83ae3f157a36