[PATCH] D29150: Add --warn-unresolved-symbols and --error-unresolved-symbols options

[Rafael Avila de Espindola via llvm-commits]

> +# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %p/Inputs/unresolved-symbols.s -o %t2.o

%p/Inputs/unresolved-symbols.s is missing from the patch.

Please add a test with -shared too to document the behavior: no warning/error.

Cheers,
Rafael