Android defines wctomb but doesn't provide it

libraries/libldap/utf-8-conv.c

@@ -328,6 +328,10 @@ ldap_x_wcs_to_utf8s ( char *utf8str, const wchar_t *wcstr, size_t count )
 	return (p - utf8str);
 }
 
+#ifdef ANDROID
+int wctomb(char *s, wchar_t wc) { return wcrtomb(s,wc,NULL); }
+int mbtowc(wchar_t *pwc, const char *s, size_t n) { return mbrtowc(pwc, s, n, NULL); }
+#endif
 
 /*-----------------------------------------------------------------------------
    Convert a UTF-8 character to a MultiByte character.