[compiler-rt] [compiler-rt] [test] Add an XFAIL for the initialization-nobug.cpp test on mingw (PR #101814)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

This shouldn't be needed any longer, after https://github.com/llvm/llvm-project/commit/534a87301b82f8d914087a848a2e88b897c24644.

https://github.com/llvm/llvm-project/pull/101814