Enable the simd_boolean test for AArch64

Also, enable the simd_i64x2_arith2 test because it doesn't need
any code changes.

Copyright (c) 2021, Arm Limited.

cranelift/codegen/src/isa/aarch64/inst/emit_tests.rs

@@ -2311,6 +2311,16 @@ fn test_aarch64_binemit() {
         "sqxtun v16.8b, v23.8h",
     ));
 
+    insns.push((
+        Inst::VecRRPair {
+            op: VecPairOp::Addp,
+            rd: writable_vreg(0),
+            rn: vreg(30),
+        },
+        "C0BBF15E",
+        "addp d0, v30.2d",
+    ));
+
     insns.push((
         Inst::VecRRR {
             alu_op: VecALUOp::Sqadd,
@@ -3803,6 +3813,17 @@ fn test_aarch64_binemit() {
         "cnt v23.8b, v5.8b",
     ));
 
+    insns.push((
+        Inst::VecMisc {
+            op: VecMisc2::Cmeq0,
+            rd: writable_vreg(12),
+            rn: vreg(27),
+            size: VectorSize::Size16x8,
+        },
+        "6C9B604E",
+        "cmeq v12.8h, v27.8h, #0",
+    ));
+
     insns.push((
         Inst::VecLanes {
             op: VecLanesOp::Uminv,