locale-util: export emoji_enable() for other code to use

src/basic/locale-util.c

@@ -305,7 +305,7 @@ out:
         return (bool) cached_answer;
 }
 
-static bool emoji_enabled(void) {
+bool emoji_enabled(void) {
         static int cached_emoji_enabled = -1;
 
         if (cached_emoji_enabled < 0) {

src/basic/locale-util.h

@@ -68,6 +68,8 @@ typedef enum {
 
 const char *special_glyph(SpecialGlyph code) _const_;
 
+bool emoji_enabled(void);
+
 const char* locale_variable_to_string(LocaleVariable i) _const_;
 LocaleVariable locale_variable_from_string(const char *s) _pure_;