[lld] [llvm] [ThinLTO] Don't mark calloc function dead (PR #72673)

[via llvm-commits]

eleviant wrote:

Well, I've just checked on Windows 11:
```
c:\AS\llvm-project\stage1>git reflog
bc265bd66323 (HEAD -> main, origin/main) HEAD@{0}: pull: Fast-forward

c:\AS\llvm-project\stage1>python bin\llvm-lit.py -vvv ..\llvm\test\CodeGen\X86\2012-11-28-merge-store-alias.ll
llvm-lit.py: c:\AS\llvm-project\llvm\utils\lit\lit\llvm\config.py:46: note: using lit tools: C:\Program Files\Git\usr\bin
-- Testing: 1 tests, 1 workers --
PASS: LLVM :: CodeGen/X86/2012-11-28-merge-store-alias.ll (1 of 1)

Testing Time: 0.35s

Total Discovered Tests: 1
  Passed: 1 (100.00%)

c:\AS\llvm-project\stage1>python bin\llvm-lit.py -vvv ..\llvm\test\CodeGen\X86\2009-02-12-DebugInfoVLA.ll
llvm-lit.py: c:\AS\llvm-project\llvm\utils\lit\lit\llvm\config.py:46: note: using lit tools: C:\Program Files\Git\usr\bin
-- Testing: 1 tests, 1 workers --
PASS: LLVM :: CodeGen/X86/2009-02-12-DebugInfoVLA.ll (1 of 1)

Testing Time: 0.45s

Total Discovered Tests: 1
  Passed: 1 (100.00%)
```

Revision `bc265bd66323` contains my changes and your tests pass on my Linux and Windows machines. Can you please try it?

https://github.com/llvm/llvm-project/pull/72673