- Add -fpermissive to compiler flags invoked byt the testsuite because
the generated files there do not have proper includes and so cause
compiler errors with GCC 14.

I was looking where in the perl script the C source code is generated
but I was unable to persuade it to generate also the necessary
includes in reasonable time. Someone more familiar with the code bas
or perl in general may have better luck. Still, I'd appreciate if
meanwhile we use this work around so that the package does not start
failing when we switch the default compiler.

If the request is OK, please forward it to Factory soon too so that
the package is ready when we switch the default compiler. Thanks.