resolve clippy errors

Signed-off-by: onur-ozkan <work@onurozkan.dev>

compiler/rustc_codegen_llvm/src/context.rs

@@ -326,6 +326,7 @@ pub unsafe fn create_module<'ll>(
     //
     // On the wasm targets it will get hooked up to the "producer" sections
     // `processed-by` information.
+    #[allow(clippy::option_env_unwrap)]
     let rustc_producer =
         format!("rustc version {}", option_env!("CFG_VERSION").expect("CFG_VERSION"));
     let name_metadata = llvm::LLVMMDStringInContext(