monkey patch bundler to package for all platforms

to allow a smooth transition from 1.9 to 2.1

Change-Id: I20eca8aaf824f1ea4289a3eef5fb31920ac888bb
Reviewed-on: https://gerrit.instructure.com/40771
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jon Jensen <jon@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>