upstream #987

Job	Run time
ruby-head-valgrind (enable)	7m 5s
xmlsoft-head (ubuntu)	3m 56s
ruby-head-valgrind (disable)	5m 2s
xmlsoft-head (windows)	13m 4s
ruby-head (ubuntu, enable)	48s
xmlsoft-head-valgrind	6m 26s
ruby-head (ubuntu, disable)	2m 53s
xmlsoft-head (macos)	4m 1s
html5lib-tests	54s
ruby-head (windows, enable)	3m 31s
jruby-head	1m 17s
ruby-head (windows, disable)	10m 13s
truffleruby-head (--disable-system-libraries --disable-static)	3m 6s
ruby-head (macos, enable)	2m 48s
truffleruby-head (--disable-system-libraries --enable-static)	5m 25s
ruby-head (macos, disable)	50s
truffleruby-head (--enable-system-libraries)	2m 29s
	1h 13m 48s

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