[llvm] [libc][ci] Use lld for linking in precommit CIs. (PR #200897)

[Aiden Grossman via llvm-commits]

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@@ -89,6 +91,7 @@ jobs:
         -DCMAKE_MSVC_DEBUG_INFORMATION_FORMAT=Embedded
         -DLIBC_COMPILE_OPTIONS_NATIVE=""
         -DLLVM_ENABLE_RUNTIMES=libc
+        -DLLVM_USE_LINKER="${{ matrix.linker }}"
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boomanaiden154 wrote:

I guess setting this to blank just uses the default?

https://github.com/llvm/llvm-project/pull/200897