[arm64]: Fix bug introduced accidentally in r30710

src/arm64/assembler-arm64.cc

Index: src/arm64/assembler-arm64.cc
diff --git a/src/arm64/assembler-arm64.cc b/src/arm64/assembler-arm64.cc
index 9d9dd1b3ba18af34945f0be6da3421b701b20993..37a2f5a29d006f1c753b2a0bb07a1183c1276893 100644
--- a/src/arm64/assembler-arm64.cc
+++ b/src/arm64/assembler-arm64.cc
@@ -2246,7 +2246,7 @@ void Assembler::debug(const char* message, uint32_t code, Instr params) {
 #ifdef USE_SIMULATOR
   // Don't generate simulator specific code if we are building a snapshot, which
   // might be run on real hardware.
-  // if (!serializer_enabled()) {
+  if (!serializer_enabled()) {
     // The arguments to the debug marker need to be contiguous in memory, so
     // make sure we don't try to emit pools.
     BlockPoolsScope scope(this);
@@ -2266,7 +2266,7 @@ void Assembler::debug(const char* message, uint32_t code, Instr params) {
     hlt(kImmExceptionIsUnreachable);
 
     return;
-  // }
+  }
   // Fall through if Serializer is enabled.
 #endif