offapi: add missing #include that could cause trouble for SDK users

... as reported by ccsheller on IRC.

Change-Id: I416b31d15388be28ca493f1f147c7786f339e6cb
(cherry picked from commit 9c161b22)
Reviewed-on: https://gerrit.libreoffice.org/17873Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

offapi/com/sun/star/drawing/FillProperties.idl

@@ -26,7 +26,7 @@
 #include <com/sun/star/drawing/BitmapMode.idl>
 #include <com/sun/star/awt/XBitmap.idl>
 #include <com/sun/star/drawing/RectanglePoint.idl>
-
+#include <com/sun/star/text/GraphicCrop.idl>
 
 
 module com { module sun { module star { module drawing {