Subject: bug#21978: tbb broken on mips64el but tests always pass

From: Ricardo Wurmus <[email-masked]>
Date: Sat, 21 Nov 2015 22:13:42 +0100

The “tbb” package appears to be broken on mips64el but both the build
phase and the check phase always pass.  This means that “tbb” is built
“successfully”, which results in downstream build failures.

Debian patches the sources of “tbb” such that the build fails on bad
tests:

    https://sources.debian.net/src/tbb/4.3~20150611-0.1/debian/patches/failonbadtests.patch/

We should do the same.