As usual after a new C++ compiler version the symbols within the
binaries get some changes.
I adjusted the symbols file again to fix the changed symbols and make
makeshlibs happy. Appended as patch or if you prefer I can also commit
the changed files to the tree on Salsa.
Tested on i386, amd64 and arm64 as also done before.
I'm sure we will see some more breakage within future uploads of new
Debian revision for the GCC 10 suite.
If you want to rebuild things locally you can do this by apply the
following additional changes to the debian folder. The override for
dh_makeshlibs is helpful in case you want to explicitly be able call this rule