Bug#723664: iceweasel: FTBFS: preferred fonts-freefont alternative nonexistent

[Aaron M. Ucko]

Source: iceweasel
Version: 24.0-1
Severity: serious
Justification: fails to build from source (but built successfully in the past)

I welcome iceweasel 24's prompt appearance in unstable.  Alas,
automated builds thereof have been failing:

  The following packages have unmet dependencies:
   sbuild-build-depends-iceweasel-dummy : Depends: fonts-freefont but it is not installable
  E: Unable to correct problems, you have held broken packages.
  apt-get failed.
  Package installation failed

Please substitute fonts-freefont-ttf.  (The alternative build
dependency on ttf-freefont is insufficient because Debian's
autobuilders, to help ensure consistency, consider such alternatives
only when explicit architecture restrictions force them to do so.)

Thanks!