spec: change some ATTRIB fields #4606

Job	Run time
linux-cmake	5m 49s
macOS	10m 44s
linux (CFLAGS="-O1 -fno-omit-frame-pointer -fsanitize=address -fno-var-tracking" --disable-bindin...	17m 17s
mingw	30m 4s
mingw-cmake	7m 44s
linux (CC="clang")	14m 7s
mips32-big-endian	26m 24s
linux (--enable-release)	36m 2s
linux (--enable-gcov --disable-bindings --disable-docs CFLAGS="-O0 -g")	9m 43s
ppc64-big-endian	13m 43s
linux (--disable-write --disable-docs)	16m 8s
vs2019	5m 20s
vs2019-ninja	4m 50s
linux (CFLAGS="-O2 -m32" --disable-bindings --disable-docs)	14m 36s
linux (CFLAGS="-O2 -fno-omit-frame-pointer -fsanitize=undefined -fno-var-tracking" --disable-bind...	31m 23s
	4h 3m 54s

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