upstream #1063

Job	Run time
jruby-head	1m 14s
html5lib-tests	52s
ruby-head-valgrind (disable)	7m 29s
ruby-head (ubuntu, enable)	2m 59s
ruby-head (ubuntu, disable)	57s
truffleruby-head (--disable-system-libraries --disable-static)	3m 6s
ruby-head (windows, enable)	5m 7s
xmlsoft-head (ubuntu)	4m 15s
truffleruby-head (--disable-system-libraries --enable-static)	5m 26s
ruby-head (windows, disable)	3m 23s
xmlsoft-head-valgrind	6m 34s
xmlsoft-head (windows)	10m 49s
truffleruby-head (--enable-system-libraries)	3m 3s
ruby-head (macos, enable)	2m 43s
xmlsoft-head (macos)	3m 36s
ruby-head (macos, disable)	2m 0s
	1h 3m 33s

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