libdxfrw: Update the submodule to the latest version from LibreCAD #161

Job	Run time
Cancel Previous Runs	6s
Test Windows	5m 52s
Test Ubuntu	5m 10s
Test macOS	5m 23s
Build Release Windows	8m 54s
Build Release Windows (OpenMP)	8m 2s
Build Release macOS	7m 15s
Build Release Windows (OpenMP) x64	8m 35s
Build Release Windows x64	9m 3s
Build Release Web	4m 3s
Upload Release Assets	0s
	1h 2m 23s

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