Fix Mac build, format breakage

src/x64/disasm-x64.cc

Index: src/x64/disasm-x64.cc
diff --git a/src/x64/disasm-x64.cc b/src/x64/disasm-x64.cc
index 225f3cc80c0eabed690679b80cabb3736fd370bb..ff5ce3b3a3ca9c68a27da81fd619e6a59d278acb 100644
--- a/src/x64/disasm-x64.cc
+++ b/src/x64/disasm-x64.cc
@@ -619,7 +619,7 @@ int DisassemblerX64::PrintImmediate(byte* data, OperandSize size) {
       value = 0;  // Initialize variables on all paths to satisfy the compiler.
       count = 0;
   }
-  AppendToBuffer("%" V8PRIxPTR, value);
+  AppendToBuffer("%" PRIx64, value);
   return count;
 }
 
@@ -2335,7 +2335,7 @@ int DisassemblerX64::InstructionDecode(v8::internal::Vector<char> out_buffer,
           default:
             UNREACHABLE();
         }
-        AppendToBuffer("test%c rax,0x%" V8PRIxPTR, operand_size_code(), value);
+        AppendToBuffer("test%c rax,0x%" PRIx64, operand_size_code(), value);
         break;
       }
       case 0xD1:  // fall through