Rollup merge of rust-lang#85762 - mati865:disable-zlib-on-windows, r=…

…Mark-Simulacrum

Do not try to build LLVM with Zlib on Windows

Fixes rust-lang#85422
Fixes rust-lang#85624

We do not install Zlib on the CI but recent builds somehow started picking it's shared version.
To avoid relying on CI binaries so let's explicitly disable it.

src/bootstrap/native.rs

@@ -181,7 +181,7 @@ impl Step for Llvm {
             .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
             .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
 
-        if target != "aarch64-apple-darwin" {
+        if target != "aarch64-apple-darwin" && !target.contains("windows") {
             cfg.define("LLVM_ENABLE_ZLIB", "ON");
         } else {
             cfg.define("LLVM_ENABLE_ZLIB", "OFF");