[lldb] Fix lldb windows build breakage from llvm#113839.

(cherry picked from commit 19c0a74)

Author: ZequanWu

lldb/tools/lldb-dap/JSONUtils.cpp

@@ -21,6 +21,7 @@
 #include "lldb/API/SBStringList.h"
 #include "lldb/API/SBStructuredData.h"
 #include "lldb/API/SBValue.h"
+#include "lldb/Host/PosixApi.h"
 
 #include "DAP.h"
 #include "ExceptionBreakpoint.h"