cannot find library libgmsh.so.4.4 needed by ...

[Nico Schlömer <nico.schloemer@gmail.com>]

Hi everyone,

when upgrading gmsh to 4.4.0, I'm getting the build error
```
[...]
dpkg-shlibdeps: error: cannot find library libgmsh.so.4.4 needed by
debian/gmsh/usr/bin/gmsh (ELF format: 'elf64-x86-64' abi:
'0201003e00000000'; RPATH: '')
dpkg-shlibdeps: error: cannot continue due to the error above
Note: libraries are not searched in other binary packages that do not
have any shlibs or symbols file.
To help dpkg-shlibdeps find private libraries, you might need to use -l.
```
see [1]. I'm not exactly sure why libgmsh.so.4.4 cannot be found; the
library is linked with
```
-Wl,-soname,libgmsh.so.4.4 -o libgmsh.so.4.4.0
```
Any hints?

Cheers,
Nico

[1] https://salsa.debian.org/science-team/gmsh/-/jobs/222258