build ModemManager with introspection

as the files it creates are required by Satellite

I thought originally that this was stopping it from cross-compiling,
but it must have been something else

pkgs/modem-manager/default.nix

@@ -15,6 +15,7 @@
   pkg-config,
   python3,
   systemd,
+  gobject-introspection,
   pkgsBuildBuild,
   buildPackages
 }: stdenv.mkDerivation rec {
@@ -34,7 +35,7 @@
   nativeBuildInputs = [
     meson
     ninja
-    # gobject-introspection
+    gobject-introspection
     gettext
     pkg-config
     libxslt
@@ -73,10 +74,11 @@
     "-Dqrtr=false"
     "-Dpolkit=no"
     "-Dplugin_foxconn=disabled"
+    "-Dplugin_quectel=disabled"
     "-Dman=false"
     "-Dexamples=false"
     "-Dtests=false"
-    "-Dintrospection=false"
+#    "-Dintrospection=false"
   ];
 
 }