[LLD][COFF] Identify /GL object files which are inside libraries

With D26647, we can already identify input object files compiled by cl.exe with
/GL. It seems to be helpful to do the same and print an error message for those
object files compiled with /GL but are inside libraries/archives too.

Reviewed By: rnk, thieta

Differential Revision: https://reviews.llvm.org/D131458