all: update FSF address in GPL 2.0 notices

If you write to 59 Temple Place you're unlikely to get a response.
Let's realign the address with a more up-to-date one from [1].

  [1] https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt



This is purely a cosmetic change, doesn't affect the meaning of the
license. Done to make rpmlint happy.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>