[lld] [lld][WebAssembly] Report unsupported PIC relocations as errors (PR #104926)

[Sam Clegg via llvm-commits]

sbc100 wrote:

Interesting.. all those errors are about `__dso_handle`, which by definition is always available at static link time.  

I think the issue here is that we probably don't want to be reporting these errors in `--relocatable` mode (i.e. when we are just making another object file).

https://github.com/llvm/llvm-project/pull/104926