add missing imports

Author: japaric

library/stdarch/crates/core_arch/src/acle/dsp.rs

@@ -20,6 +20,9 @@
 //! - [ ] __smlawb
 //! - [ ] __smlawt
 
+#[cfg(test)]
+use stdsimd_test::assert_instr;
+
 extern "C" {
  #[link_name = "llvm.arm.qadd"]
  fn arm_qadd(a: i32, b: i32) -> i32;

library/stdarch/crates/core_arch/src/acle/simd32.rs

@@ -62,6 +62,9 @@
 //! - [x] __smusd
 //! - [x] __smusdx
 
+#[cfg(test)]
+use stdsimd_test::assert_instr;
+
 types! {
  /// ARM-specific 32-bit wide vector of four packed `i8`.
  pub struct int8x4_t(i8, i8, i8, i8);