Support _emoji dictionary lists for symbol and emoji pronunciations.

CHANGELOG.md

 *  Group the encoding handling into a single place with a clean interface and tests.
 *  Support all ISO 8859 encodings.
 *  Support for multi-word text replacements in language dictionaries.
+*  Support compiling `_emoji` dictionary files if present.
 
 bug fixes:
 

src/libespeak-ng/compiledict.c

 		compile_dictlist_file(path, "listx");
 		compile_dictlist_file(path, "list");
 	}
+	compile_dictlist_file(path, "emoji");
 	compile_dictlist_file(path, "extra");
 
 	compile_dictlist_end(f_out);