RIOT-OS/RIOT — pull request #1605 by BytesGalore (2014-08-23 06:19:14+00:00)
Title: travis: force specific compiler branch to install the c++ headers

The stock `gcc-arm-none-eabi` installed by travis does not ship c++ headers, which
is a known [bug](https://bugs.launchpad.net/gcc-arm-embedded/+bug/1309060).
This PR is ment as a workaround until the stock `gcc-arm-none-eabi` installs the c++ headers.