[PATCH] D58411: Update `ld.lld --version` string for monorepo.

[Rui Ueyama via Phabricator via llvm-commits]

ruiu created this revision.
ruiu added a reviewer: phosek.
Herald added subscribers: jdoerfert, mgorny.
Herald added a project: LLVM.

This patch basically does the same thing as
https://reviews.llvm.org/rL352729 did to clang.

With this patch, lld now prints out a correct version string including
a git commit id like this:

  $ bin/ld.lld --version
  LLD 9.0.0 (https://github.com/llvm/llvm-project.git c027658504fa9e68173f53dedaf223695a65e910) (compatible with GNU linkers)

Fixes https://bugs.llvm.org/show_bug.cgi?id=40780


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D58411

Files:
  lld/Common/CMakeLists.txt
  lld/Common/Version.cpp

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