upstream #1061

Job	Run time
jruby-head	1m 11s
html5lib-tests	53s
ruby-head (ubuntu, enable)	2m 53s
ruby-head (ubuntu, disable)	46s
truffleruby-head (--disable-system-libraries --disable-static)	3m 14s
ruby-head (windows, enable)	3m 24s
xmlsoft-head (ubuntu)	3m 51s
truffleruby-head (--disable-system-libraries --enable-static)	5m 18s
ruby-head (windows, disable)	5m 39s
xmlsoft-head (windows)	11m 57s
ruby-head-valgrind (disable)	7m 49s
ruby-head (macos, enable)	2m 47s
truffleruby-head (--enable-system-libraries)	2m 42s
ruby-head (macos, disable)	1m 9s
xmlsoft-head (macos)	4m 9s
xmlsoft-head-valgrind	6m 1s
	1h 3m 43s

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