refactor(fmod): move all original files into fmod directory

lib/flac-1.2.1/include/share/utf8.h

@@ -1,25 +0,0 @@
-#ifndef SHARE__UTF8_H
-#define SHARE__UTF8_H
-
-/*
- * Convert a string between UTF-8 and the locale's charset.
- * Invalid bytes are replaced by '#', and characters that are
- * not available in the target encoding are replaced by '?'.
- *
- * If the locale's charset is not set explicitly then it is
- * obtained using nl_langinfo(CODESET), where available, the
- * environment variable CHARSET, or assumed to be US-ASCII.
- *
- * Return value of conversion functions:
- *
- *  -1 : memory allocation failed
- *   0 : data was converted exactly
- *   1 : valid data was converted approximately (using '?')
- *   2 : input was invalid (but still converted, using '#')
- *   3 : unknown encoding (but still converted, using '?')
- */
-
-int utf8_encode(const char *from, char **to);
-int utf8_decode(const char *from, char **to);
-
-#endif