Bug 1072598 - Add profile scripts to zip_files. r=nthomas

Since Bugs 1022928 and 1061801 landed, we support profiling non-dev
builds. Therefore, ship profiling scripts with nightly builds.
Bug 1058282 - Explicitly request to use ipv4 only to get round 8.8.8.8 probing. r=btseng
Bug 1038531 - Unify NetworkWorker. r=fabrice r=mrbkap