[DRE-maint] ruby-uglifier is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-uglifier 2.7.2+dfsg-1 is marked for autoremoval from testing on 2017-01-16

It is affected by these RC bugs:
846738: ruby-uglifier: FTBFS: ERROR: Test "ruby2.3" failed: Failure/Error: expect(Uglifier.new.compile('var foo="\0bar"')).to include("\\x00bar")