Move xfa/fxfa/include to xfa/fxfa

BUG=pdfium:611

Review-Url: https://codereview.chromium.org/2383593002
diff --git a/fpdfsdk/cpdfsdk_annothandlermgr.cpp b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
index 709c080..0fac080 100644
--- a/fpdfsdk/cpdfsdk_annothandlermgr.cpp
+++ b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
@@ -20,8 +20,8 @@
 #ifdef PDF_ENABLE_XFA
 #include "fpdfsdk/cpdfsdk_xfawidgethandler.h"
 #include "fpdfsdk/fpdfxfa/fpdfxfa_page.h"
-#include "xfa/fxfa/include/xfa_ffpageview.h"
-#include "xfa/fxfa/include/xfa_ffwidget.h"
+#include "xfa/fxfa/xfa_ffpageview.h"
+#include "xfa/fxfa/xfa_ffwidget.h"
 #endif  // PDF_ENABLE_XFA
 
 CPDFSDK_AnnotHandlerMgr::CPDFSDK_AnnotHandlerMgr(CPDFSDK_Environment* pEnv)