[Debian-med-packaging] Bug#1028624: libdeflate: Please build with -O1 on alpha to fix FTBFS

[Michael Cree]

> I suspect this might be better worked around with -Wl,-no-relax on the
> linking only rather than disabling compiler optimisations.  I intend to
> run a test of that today.

Nice idea, but, it didn't solve the linker errors.  Stick with reducing
compiler optimisation to -O1.

Cheers
Michael.