Move fpdfsdk/fpdfxfa/include to fpdfsdk/fpdfxfa

BUG=pdfium:611

Review-Url: https://codereview.chromium.org/2381993002
diff --git a/fpdfsdk/cpdfsdk_interform.cpp b/fpdfsdk/cpdfsdk_interform.cpp
index eb257cc..b74f98a 100644
--- a/fpdfsdk/cpdfsdk_interform.cpp
+++ b/fpdfsdk/cpdfsdk_interform.cpp
@@ -37,8 +37,8 @@
 #include "third_party/base/stl_util.h"
 
 #ifdef PDF_ENABLE_XFA
-#include "fpdfsdk/fpdfxfa/include/fpdfxfa_doc.h"
-#include "fpdfsdk/fpdfxfa/include/fpdfxfa_util.h"
+#include "fpdfsdk/fpdfxfa/fpdfxfa_doc.h"
+#include "fpdfsdk/fpdfxfa/fpdfxfa_util.h"
 #include "fpdfsdk/include/cpdfsdk_xfawidget.h"
 #include "xfa/fxfa/include/cxfa_eventparam.h"
 #include "xfa/fxfa/include/xfa_ffdocview.h"