Use explicit target compiler flag and set relocation model to static

Author: winstonallo

tests/assembly-llvm/regparm-module-flag.rs

@@ -1,15 +1,18 @@
 //@ add-core-stubs
 //@ assembly-output: emit-asm
-//@ compile-flags: -O -Zregparm=3
-//@ only-x86
+//@ compile-flags: -O -Zregparm=3 --target=i686-unknown-linux-gnu -C relocation-model=static
+//@ needs-llvm-components: x86
 
 #![feature(no_core)]
 #![no_std]
 #![no_core]
 #![crate_type = "lib"]
 
+extern crate minicore;
 use minicore::*;
 
+type c_void = u8;
+
 unsafe extern "C" {
     fn memset(p: *mut c_void, val: i32, len: usize) -> *mut c_void;
 }