[llvm] [llvm-ml] Adds /quiet flag to llvm-ml (PR #107308)

[Nico Weber via llvm-commits]

nico wrote:

Can we get a test too? This should be sufficient:

```diff
diff --git a/llvm/test/tools/llvm-ml/run.asm b/llvm/test/tools/llvm-ml/run.asm
index 0e4f2bf137f1..11e2d72ae06c 100644
--- a/llvm/test/tools/llvm-ml/run.asm
+++ b/llvm/test/tools/llvm-ml/run.asm
@@ -1,3 +1,4 @@
 ; RUN: llvm-ml --help | FileCheck %s
+; RUN: llvm-ml /nologo /quiet
 
 ; CHECK: USAGE: llvm-ml
```

https://github.com/llvm/llvm-project/pull/107308