fix assert_instr test

Author: japaric

coresimd/arm/armclang.rs

@@ -4,6 +4,9 @@
 //!
 //! - [ARM Compiler v 6.10 - armclang Reference Guide](https://developer.arm.com/docs/100067/0610)
 
+#[cfg(test)]
+use stdsimd_test::assert_instr;
+
 /// This intrinsic inserts a BKPT instruction into the instruction stream generated by the compiler
 ///
 /// It enables you to include a breakpoint instruction in your Rust code
@@ -16,7 +19,7 @@
 /// [ARM's documentation](https://developer.arm.com/docs/100067/latest/compiler-specific-intrinsics/__breakpoint-intrinsic)
 ///
 /// **NOTE** Due compiler limitations this function only supports the range `0...255` in A32 mode.
-#[cfg_attr(test, assert_instr(bkpt))]
+#[cfg_attr(test, assert_instr(bkpt, val = 0))]
 #[inline(always)]
 #[rustc_args_required_const(0)]
 pub unsafe fn __breakpoint(val: i32) {