rethinkdb 1.13.4
rethinkdb: update 1.13.4 bottle.

Closes #31686.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Don't overwrite optimization flag map in ENV.clang
mongodb 2.7.5
mongodb: update 2.6.4 bottle.
rethinkdb: update 1.13.4 bottle.