encode: dwg_downgrade_MATERIAL, add ACAD eed #4547

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Job	Run time
macOS	5m 27s
linux-cmake	2m 8s
linux (CFLAGS="-O1 -fno-omit-frame-pointer -fsanitize=address -fno-var-tracking" --disable-bindin...	56s
linux (CC="clang")	1m 3s
mingw-cmake	2m 59s
mingw	14m 12s
linux (--enable-release)	1m 18s
linux (--enable-gcov --disable-bindings --disable-docs CFLAGS="-O0 -g")	1m 39s
linux (--disable-write --disable-docs)	1m 26s
mips32-big-endian	9m 54s
linux (CFLAGS="-O2 -m32" --disable-bindings --disable-docs)	1s
ppc64-big-endian	6m 23s
linux (CFLAGS="-O2 -fno-omit-frame-pointer -fsanitize=undefined -fno-var-tracking" --disable-bind...	1s
vs2019	5m 6s
vs2019-ninja	4m 20s
	56m 53s

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