Snippets for mumble 1.5.939 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/community/mumble/mumble-1.5.939-r0.log.

• /home/buildozer/aports/community/mumble/src/mumble-1.5.939/src/mumble/LegacyPlugin.cpp:200:38: warning: 'template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc> class std::__cxx11::wstring_convert' is deprecated [-Wdeprecated-declarations]
    200 |                                 std::wstring_convert< std::codecvt_utf8< wchar_t > >().from_bytes(currentName);
        |                                      ^~~~~~~~~~~~~~~