upstream #1069

Job	Run time
jruby-head	1m 10s
html5lib-tests	56s
ruby-head-valgrind (disable)	7m 53s
ruby-head (ubuntu, enable)	53s
ruby-head (ubuntu, disable)	2m 54s
truffleruby-head (--disable-system-libraries --disable-static)	2m 53s
ruby-head (windows, enable)	3m 50s
xmlsoft-head (ubuntu)	3m 45s
truffleruby-head (--disable-system-libraries --enable-static)	5m 13s
ruby-head (windows, disable)	6m 4s
xmlsoft-head-valgrind	6m 40s
xmlsoft-head (windows)	11m 6s
truffleruby-head (--enable-system-libraries)	2m 26s
ruby-head (macos, enable)	2m 44s
xmlsoft-head (macos)	3m 34s
ruby-head (macos, disable)	1m 33s
	1h 3m 34s

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