[bug#31530] Fix qucs bug and update circuit simulators

[Theodoros Foradis]

Hello guix,

This patch series fixes a bug introduced to qucs with glibc-2.26, and
also updates a couple related packages.

 gnu/packages/engineering.scm | 261 +++++++++---------------
 gnu/packages/maths.scm       |  13 ------------
 2 files changed, 142 insertions(+), 132 deletions(-)
 gnu: qucs-s: Update to 0.0.20.
 gnu: lapack-3.5: Delete package.
 gnu: xyce-serial: Update to 6.8.
 gnu: trilinos-serial-xyce: Update to 12.12.1.
 gnu: libngspice: Update to 27.
 gnu: qucs: Build from git to fix bug.
-- 
Theodoros Foradis