[lldb] Fix a warning

This patch fixes:

  lldb/source/Plugins/Process/wasm/ProcessWasm.cpp:107:25: error:
  format specifies type 'unsigned long long' but the argument has type
  'lldb::tid_t' (aka 'unsigned long') [-Werror,-Wformat]

Author: kazutakahirata

lldb/source/Plugins/Process/wasm/ProcessWasm.cpp

@@ -104,7 +104,7 @@ llvm::Expected<std::vector<lldb::addr_t>>
 ProcessWasm::GetWasmCallStack(lldb::tid_t tid) {
   StreamString packet;
   packet.Printf("qWasmCallStack:");
-  packet.Printf("%llx", tid);
+  packet.Printf("%" PRIx64, tid);
 
   StringExtractorGDBRemote response;
   if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response) !=