meson: add embryo as a dep of edje

if you want to build a edje theme without building all of efl, you can
do that now. Before embryo was missing and no scripts could be compiled.
Now this is possible and works.

src/bin/edje/meson.build

@@ -42,7 +42,7 @@ else
     env = find_program('env', native: true)
     edje_cc_exe = [env, 'EFL_RUN_IN_TREE=1', edje_cc.full_path()]
   endif
-  edje_depends = [edje_cc, epp, evas_engine_buffer_mod]
+  edje_depends = [edje_cc, epp, evas_engine_buffer_mod, embryo_cc]
 endif
 
 edje_decc_src = [