Bug#722252: lapack: -Bsymbolic-functions prevents override of xerblas_

[Julian Taylor]

>> I can provide a patch later, what variant do you prefer?
> A priori, I would prefer the list (I think it is clearer this way for
> other maintainers to understand what you did).
> 


I committed a fix + autopkgtests to svn.
I went with stripping the flag, --dynamic-list does not seem work with
the gold linker :(