[lldb-dap] Fix win32 build. (#135638)

This enum was not fully specified.
diff --git a/lldb/tools/lldb-dap/Transport.cpp b/lldb/tools/lldb-dap/Transport.cpp
index 96b8a48..ffd0c49 100644
--- a/lldb/tools/lldb-dap/Transport.cpp
+++ b/lldb/tools/lldb-dap/Transport.cpp
@@ -38,7 +38,7 @@
   bool timeout_supported = true;
   // FIXME: SelectHelper does not work with NativeFile on Win32.
 #if _WIN32
-  timeout_supported = descriptor.GetFdType() == eFDTypeSocket;
+  timeout_supported = descriptor.GetFdType() == IOObject::eFDTypeSocket;
 #endif
 
   if (timeout && timeout_supported) {