Add missing includes to avoid the following build failure with gcc >= 14:
codec_skeleton.c: In function 'skeleton_process_fisbone_message_header': codec_skeleton.c:119:9: error: implicit declaration of function 'utf8_decode' [-Wimplicit-function-declaration]
119 | if (utf8_decode(header, &decoded) < 0) {
| ^~~~~~~~~~~
Necessary for Flatpak support. With the release of FreeDesktop SDK 24.08, these kinds of issues are no longer permitted. I would recommend you to merge this
Add missing includes to avoid the following build failure with gcc >= 14:
Fixes: