gammu: add cmakeFlags for CMake >= 3.5 (#449950)

pkgs/by-name/ga/gammu/package.nix

@@ -45,6 +45,7 @@ stdenv.mkDerivation rec {
   ];
 
   cmakeFlags = [
+    "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
     # Fix build with CMake 4
     (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.10")
   ];
@@ -69,7 +70,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     homepage = "https://wammu.eu/gammu/";
     description = "Command line utility and library to control mobile phones";
-    license = licenses.gpl2;
+    license = licenses.gpl2Only;
     platforms = platforms.linux;
     maintainers = [ maintainers.coroa ];
   };