Revert "Remove unused distros from Assetfile."

This reverts commit 247c9d0ecaa00b398eb0112c6ce1e326903ecaa3.
Merge pull request #4456 from rjackson/revert-removal-of-distros

Revert "Remove unused distros from Assetfile."
Use newly added `apply` and `applyStr` helpers elsewhere. Also minify them so they're inlined.

Breakdown of arguments length while running the Ember test suite:
{0: 444966, 1: 62482, 2: 23473, 3: 14270, 4: 3000, 5: 755}
Fix case where args isn't passed

Scumbag @ebryn didn't rerun all the tests before pushing