vlc-debian-llvm-ucrt: use internal ssp code

The code in mingw-w64 11 should be enough. And it should be compatible with UWP.

It is build, we we need to avoid build failure when linking with libssp
manually, as in https://github.com/mstorsjo/llvm-mingw/commit/4ee7cc97de3cf72d89ace2b1e9a704cc5b74e969