zsnes2: fix build

commit 7aeac03 (PR #386495) dropped libX11 and libGLU from
propagatedBuildInputs in SDL_compat, and #389106 pointed SDL to
SDL_compat, which broke this build

pkgs/applications/emulators/zsnes/2.x.nix

@@ -6,6 +6,7 @@
   libGL,
   libGLU,
   libpng,
+  libX11,
   nasm,
   pkg-config,
   zlib,
@@ -18,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "xyproto";
     repo = "zsnes";
-    rev = finalAttrs.version;
+    tag = finalAttrs.version;
     hash = "sha256-Xz+9YgMpnHyno7vP67aut4tIyG/gTn7SnU2FO2QMND0=";
   };
 
@@ -32,6 +33,7 @@ stdenv.mkDerivation (finalAttrs: {
     libGL
     libGLU
     libpng
+    libX11
     zlib
   ];