Move core/fxcrt/include to core/fxcrt

BUG=pdfium:611

Review-Url: https://codereview.chromium.org/2382723003
diff --git a/fpdfsdk/include/cpdfsdk_widget.h b/fpdfsdk/include/cpdfsdk_widget.h
index 0171091..8c10a21 100644
--- a/fpdfsdk/include/cpdfsdk_widget.h
+++ b/fpdfsdk/include/cpdfsdk_widget.h
@@ -12,8 +12,8 @@
 #include "core/fpdfdoc/cpdf_aaction.h"
 #include "core/fpdfdoc/cpdf_action.h"
 #include "core/fpdfdoc/cpdf_annot.h"
-#include "core/fxcrt/include/fx_coordinates.h"
-#include "core/fxcrt/include/fx_string.h"
+#include "core/fxcrt/fx_coordinates.h"
+#include "core/fxcrt/fx_string.h"
 #include "fpdfsdk/include/cpdfsdk_baannot.h"
 #include "fpdfsdk/include/pdfsdk_fieldaction.h"
 #include "fpdfsdk/pdfwindow/PWL_Wnd.h"