Add more variant of gfdl

Some package are particularly creative about grammar. Even if
incorrect allow it.

Signed-off-by: Niels Thykier <niels@thykier.net>
Add gfdl license text example

Add license text example as false positive. Do not trigger tag.

Signed-off-by: Niels Thykier <niels@thykier.net>
Add some missing x32 info and consider it a bi-arch

It use currently used in gcc (e.g. libx32<LIB> packages).

Signed-off-by: Niels Thykier <niels@thykier.net>
Special gcc -dev packages for dev-pkg-symlinks

gcc stores its (some of its?) dev-pkg symlinks in special directories;
make Lintian these when the source appears to be gcc.

Signed-off-by: Niels Thykier <niels@thykier.net>