Bug#1143814: tulip builds with -march=native

[Adrian Bunk]

Source: tulip
Version: 6.0.1+dfsg-3
Severity: serious
Tags: ftbfs

-march=native is a baseline violation on architectures where
it is supported, and causes a FTBFS on architectures where
it is not supported.

It also changes the set of machines where the package might run
based on the capabilities of the buildd, e.g. on amd64 code built
on an AMD buildd might not run on Intel hardware and code built
on an Intel buildd might not run on AMD hardware.