kiji-express-examples: Update versions for Chirashi 1.2.6 release

commit: https://github.com/kijiproject/kiji-express-examples/commit/aea63fab06453d2b94a5eee2f2c0dda31713e6c1
kiji-modeling: Add Chirashi 1.2.6 releae manifest

commit: https://github.com/kijiproject/kiji-modeling/commit/de03dc9e6e191c8dff3da9296d93cdcfe4c28530
kiji-express-music: Update versions for Chirashi 1.2.6 release

commit: https://github.com/kijiproject/kiji-express-music/commit/fa91bed7cd118ee1f6e33502ecc806081551e8a5
kiji-model-repository: Update versions for Chirashi 1.2.6 release

commit: https://github.com/kijiproject/kiji-model-repository/commit/da0893d0a444a8c677a156d4f1fad3a8d18b2b3f
kiji-scoring: Update versions for Chirashi 1.2.6 release

commit: https://github.com/kijiproject/kiji-scoring/commit/9004a363ec2f8a3a0d24cfeee924ca4b856b57bb