[Debian-med-packaging] Bug#776812: vsearch: FTBFS on non-x86: uses non-portable flags

[Aaron M. Ucko]

Source: vsearch
Version: 1.0.7+dfsg-1
Severity: important
Justification: fails to build from source

Builds of vsearch on non-x86 architectures have been failing due to its
use of the x86-specific compilation flags -msse2 and -mtune=core2.
(Most of the x86 builds have failed as well, due to different issues
I'll report separately.)  -msse2 is bad practice even on x86: on *-i386,
it entirely precludes execution on older systems Debian otherwise
continues to support, and on *-amd64, it is redundant and as such
pointless.  -mtune=core2 is okay on x86, but problematic elsewhere.

As such, could you please rescind the use of -msse2 altogether, and
either do the same for -mtune=core2 or at minimum use it only on x86?

Thanks!