upstream #1108

Job	Run time
xmlsoft-head-valgrind	6m 46s
ruby-head (ubuntu, enable)	45s
ruby-head (ubuntu, disable)	49s
html5lib-tests	48s
jruby-head	1m 1s
ruby-head (windows, enable)	3m 19s
ruby-head-valgrind (disable)	8m 55s
ruby-head (windows, disable)	3m 30s
truffleruby-head (--disable-system-libraries --disable-static)	3m 35s
ruby-head (macos, enable)	39s
xmlsoft-head (ubuntu)	51s
truffleruby-head (--disable-system-libraries --enable-static)	5m 31s
truffleruby-head (--enable-system-libraries)	2m 51s
ruby-head (macos, disable)	32s
xmlsoft-head (windows)	9m 39s
xmlsoft-head (macos)	1m 25s
	50m 56s

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