internal/rosa/llvm: migrate musl

This removes the pointless special treatment given to musl.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/stage0.go

@@ -7,9 +7,9 @@ import (
 )
 
 func (t Toolchain) newStage0() (pkg.Artifact, string) {
-	musl, runtimes, clang := t.NewLLVM()
+	runtimes, clang := t.NewLLVM()
 	return t.New("rosa-stage0", 0, []pkg.Artifact{
-		musl,
+		t.Load(Musl),
 		t.Load(LLVMCompilerRT),
 		runtimes,
 		clang,