enlightenment.efl: revert from libgbm to mesa to fix the build

Without the change the build fails as
https://hydra.nixos.org/build/282796393:

    In file included from ../src/modules/evas/engines/gl_drm/evas_engine.c:2:
    ../src/modules/evas/engines/gl_drm/evas_engine.h:24:11: fatal error: EGL/eglmesaext.h: No such file or directory
       24 | # include <EGL/eglmesaext.h>
          |           ^~~~~~~~~~~~~~~~~~

pkgs/desktops/enlightenment/efl/default.nix

@@ -40,7 +40,7 @@
   libxkbcommon,
   luajit,
   lz4,
-  libgbm,
+  mesa,
   mint-x-icons,
   openjpeg,
   openssl,
@@ -91,7 +91,7 @@ stdenv.mkDerivation rec {
     libsndfile
     libtiff
     lz4
-    libgbm
+    mesa
     openssl
     systemd
     udev