[DebugInfo] Adjust x86 location-list tests for instruction referencing

This patch updates location lists in various x86 tests to reflect what
instruction referencing produces. There are two flavours of change:
 * Not following a register copy immediately, because instruction
   referencing can make some slightly smarter decisions,
 * Extended ranges, due to having additional information.

The register changes aren't that interesting, it's just a choice between
equally legitimate registers that instr-ref does differently. The extended
ranges are largely due to following stack restores better.

Differential Revision: https://reviews.llvm.org/D114362