firefox: Fix the build with wayland 1.20.0

See also:
- https://git.alpinelinux.org/aports/commit/community/firefox-esr?id=a408069e75632ce625aea68c70c23ee9e30995a5
- https://bugs.gentoo.org/811840

pkgs/applications/networking/browsers/firefox/common.nix

@@ -130,6 +130,8 @@ buildStdenv.mkDerivation ({
   inherit src unpackPhase meta;
 
   patches = [
+    # Upstream bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1745560:
+    ./fix-build-with-wayland-1.20.patch
   ] ++
   lib.optional (lib.versionAtLeast version "86") ./env_var_for_system_dir-ff86.patch ++
   lib.optional (lib.versionAtLeast version "90") ./no-buildconfig-ffx90.patch ++

pkgs/applications/networking/browsers/firefox/fix-build-with-wayland-1.20.patch

@@ -0,0 +1,13 @@
+diff --git a/widget/gtk/mozwayland/mozwayland.c b/widget/gtk/mozwayland/mozwayland.c
+index 7a448e6..7792581 100644
+--- a/widget/gtk/mozwayland/mozwayland.c
++++ b/widget/gtk/mozwayland/mozwayland.c
+@@ -200,3 +200,8 @@ MOZ_EXPORT int wl_list_empty(const struct wl_list* list) { return -1; }
+
+ MOZ_EXPORT void wl_list_insert_list(struct wl_list* list,
+                                     struct wl_list* other) {}
++
++MOZ_EXPORT struct wl_proxy *
++wl_proxy_marshal_flags(struct wl_proxy *proxy, uint32_t opcode,
++                      const struct wl_interface *interface, uint32_t version,
++                      uint32_t flags, ...) { return NULL; }