another dxf subsample added

.gitattributes

@@ -820,6 +820,7 @@ Boolean_set_operations_2/demo/Boolean_set_operations_2_GraphicsView/data/logo.bp
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 Boolean_set_operations_2/demo/Boolean_set_operations_2_GraphicsView/data/vlsi_1_b.dxf -text
+Boolean_set_operations_2/demo/Boolean_set_operations_2_GraphicsView/data/vlsi_1_c.dxf -text
 Boolean_set_operations_2/demo/Boolean_set_operations_2_GraphicsView/data/vlsi_2.dxf -text svneol=unset#application/octet-stream
 Boolean_set_operations_2/demo/Boolean_set_operations_2_GraphicsView/help/index.html -text
 Boolean_set_operations_2/demo/Boolean_set_operations_2_GraphicsView/icons/P.bmp -text

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