make type-check-4 asm tests about non-const expressions

Author: RalfJung

tests/ui/asm/aarch64/type-check-4.rs

@@ -0,0 +1,9 @@
+use std::arch::global_asm;
+
+fn main() {}
+
+// Constants must be... constant
+fn non_const_fn(x: i32) -> i32 { x }
+
+global_asm!("/* {} */", const non_const_fn(0));
+//~^ERROR: cannot call non-const fn

tests/ui/asm/aarch64/type-check-4.stderr

@@ -0,0 +1,11 @@
+error[E0015]: cannot call non-const fn `non_const_fn` in constants
+  --> $DIR/non-const.rs:8:31
+   |
+LL | global_asm!("/* {} */", const non_const_fn(0));
+   |                               ^^^^^^^^^^^^^^^
+   |
+   = note: calls in constants are limited to constant functions, tuple structs and tuple variants
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0015`.