[Skiboot] [PATCH] travis: Install power8 simulator for make check

[Stewart Smith]

Joel Stanley <joel at jms.id.au> writes:
> This downloads and installs mambo, the power8 simulator, including some
> dependencies to ensure it runs on Travis' ancient Ubuntu 12.04.
>
> Without the newer libc, you'll see a warning like this:
>
>  /opt/ibm/systemsim-p8/bin/systemsim-pegasus:
>   /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.20' not
>   found (required by /opt/ibm/systemsim-p8/bin/systemsim-pegasus)
>
> Where GLIBCXX_3.4.20 is GCC 4.9. This is why we require libstdc++ from the
> ppa.

Awesome! Merged.