nop implementation of hint(YIELD) (#130)

diff --git a/src/aarch64/simulator-aarch64.cc b/src/aarch64/simulator-aarch64.cc
index 0c842ab..28c5a1a 100644
--- a/src/aarch64/simulator-aarch64.cc
+++ b/src/aarch64/simulator-aarch64.cc
@@ -7067,6 +7067,7 @@
     }
     case "hint_hm_hints"_h:
     case "nop_hi_hints"_h:
+    case "yield_hi_hints"_h:
     case "esb_hi_hints"_h:
     case "csdb_hi_hints"_h:
       break;