Rollup merge of rust-lang#72696 - jethrogb:jb/llvm-zlib, r=Mark-Simulacrum

Enable LLVM zlib

Compilers may generate ELF objects with compressed sections (although rustc currently doesn't do this). Currently, when linking these with `rust-lld`, you'll get this error:

`rust-lld: error: ...: contains a compressed section, but zlib is not available`

This enables zlib when building LLVM.

Author: RalfJung

src/bootstrap/native.rs

@@ -158,7 +158,7 @@ impl Step for Llvm {
             .define("LLVM_INCLUDE_TESTS", "OFF")
             .define("LLVM_INCLUDE_DOCS", "OFF")
             .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
-            .define("LLVM_ENABLE_ZLIB", "OFF")
+            .define("LLVM_ENABLE_ZLIB", "ON")
             .define("WITH_POLLY", "OFF")
             .define("LLVM_ENABLE_TERMINFO", "OFF")
             .define("LLVM_ENABLE_LIBEDIT", "OFF")