scilab packages for arm64 should contain modelica compiler

Scilab packages for arm64 should contain modelica compiler.

The changelog line from 2017 mentions missed `ocamlopt`:

> scilab (5.5.0~beta-1+git~20140406-1522-2) unstable; urgency=medium
>
> [ Matthias Klose ]
> * Configure --without-modelica on arm64 and ppc64el, apparently the
> package wants ocamlopt.
>
> -- Sylvestre Ledru <email address hidden> Tue, 08 Apr 2014 11:23:53 +0200

But this is no more issue as for today. This binary is available for arm64 - https://packages.ubuntu.com/search?suite=groovy&arch=arm64&mode=exactfilename&searchon=contents&keywords=ocamlopt .

Manual compilation of Scilab with `--with-modelica` results in fully-functional modelica compiler. So one can run Xcos with Modelica blocks without issues.

Please remove `--without-modelica` from next releases of Ubuntu.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: scilab 6.1.0+dfsg1-6build2
ProcVersionSignature: Ubuntu 5.8.0-1006.9-raspi 5.8.14
Uname: Linux 5.8.0-1006-raspi aarch64
ApportVersion: 2.20.11-0ubuntu50.1
Architecture: arm64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Fri Nov 20 16:41:51 2020
ImageMediaBuild: 20201028
PackageArchitecture: all
RebootRequiredPkgs:
 linux-image-5.8.0-1007-raspi
 linux-base
SourcePackage: scilab
UpgradeStatus: No upgrade log present (probably fresh install)