spec: change some ATTRIB fields #4605

Job	Run time
ppc64-big-endian	13m 44s
linux (CFLAGS="-O1 -fno-omit-frame-pointer -fsanitize=address -fno-var-tracking" --disable-bindin...	17m 0s
linux (CC="clang")	14m 12s
linux (--enable-release)	36m 17s
linux (--enable-gcov --disable-bindings --disable-docs CFLAGS="-O0 -g")	9m 19s
linux (--disable-write --disable-docs)	16m 6s
linux (CFLAGS="-O2 -m32" --disable-bindings --disable-docs)	15m 44s
linux (CFLAGS="-O2 -fno-omit-frame-pointer -fsanitize=undefined -fno-var-tracking" --disable-bind...	32m 20s
mingw	30m 18s
linux-cmake	6m 5s
macOS	11m 11s
mingw-cmake	7m 13s
mips32-big-endian	27m 39s
vs2019	5m 16s
vs2019-ninja	4m 28s
	4h 6m 52s

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