[lld] [lld][ELF] Fix FileCheck RUN line in gc-sections-keep-shared-start.s. NFC (PR #207678)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

This looks good to me. Thanks for the patch.

A possible alternative is to add -Ttext 0x1000 to retain the original offsets. However I expect the size of the .dynsym, .gnu.hash  that precede .text in the example will be stable so I don't think that this is necessary.

Please leave some time for other reviewers to comment before merging.

https://github.com/llvm/llvm-project/pull/207678