crashes: limit a couple tests to only run on x86_64 and/or not on windows

Author: matthiaskrgr

tests/crashes/113280.rs

@@ -1,4 +1,5 @@
 //@ known-bug: #113280
+//@ only-x86_64
 
 #![feature(dyn_star, pointer_like_trait)]
 #![allow(incomplete_features)]

tests/crashes/121444.rs

@@ -1,6 +1,8 @@
 //@ known-bug: #121444
 //@ compile-flags: -Copt-level=0
 //@ edition:2021
+//@ only-x86_64
+//@ ignore-windows
 #[repr(align(536870912))]
 pub struct A(i64);
 

tests/crashes/123077-1.rs

@@ -1,4 +1,5 @@
 //@ known-bug: #123077
+//@ only-x86_64
 use std::arch::x86_64::{__m128, _mm_blend_ps};
 
 pub fn sse41_blend_noinline( ) -> __m128 {

tests/crashes/123077-2.rs

@@ -1,5 +1,6 @@
 //@ compile-flags: -g -Copt-level=0
 //@ known-bug: #34127
+//@ only-x86_64
 
 pub fn main() {
 let _a = [(); 1 << 63];