Add ICE 77735 (#503)

* Add ICE 77735

* formatting fix

Author: oliviacrain

ices/77735.rs

@@ -0,0 +1,10 @@
+#![feature(platform_intrinsics)]
+#![feature(staged_api)]
+struct f32x3();
+extern "platform-intrinsic" {
+    #[rustc_const_stable(feature = "foo", since = "1.3.37")]
+    fn simd_extract<T, U>(x: T, idx: u32) -> U;
+}
+const Y0: i8 = unsafe { simd_extract(f32x3, 0) };
+
+fn main() {}