[clang] XFAIL clang/test/CodeGen/distributed-thin-lto/pass-plugin.ll (PR #186425)

[Hubert Tong via cfe-commits]

hubert-reinterpretcast wrote:

> This seem to fail if we build on an AIX system. It can't find the symbol introduced. We are investigating the issue now.

The plugin has a dependency on a symbol (`_ZTVN4llvm2cl3optIbLb0ENS0_6parserIbEEEE` a.k.a. `vtable for llvm::cl::opt<bool, false, llvm::cl::parser<bool> >`) and is expecting to resolve it at load time from the symbols already loaded in the running program. The issue is that, in the build of `clang` on AIX, there is no loader symbol table entry for that symbol available in the modules which are loaded in the program. It might be an issue in the link command step.

https://github.com/llvm/llvm-project/pull/186425