foomatic-filters: add -fcommon workaround
foomatic-filters: add -fcommon workaround

Workaround build failure on -fno-common toolchains like upstream
gcc-10. Otherwise build fails as:

    ld: foomatic_rip-options.o:/build/foomatic-filters-4.0.17/options.c:49: multiple definition of
      `cupsfilter'; foomatic_rip-foomaticrip.o:/build/foomatic-filters-4.0.17/foomaticrip.c:158: first defined here

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs