upstream #1241

Job	Run time
xmlsoft-head-valgrind	3m 55s
html5lib-tests	54s
xmlsoft-head (ubuntu)	4m 32s
ruby-head-valgrind (disable)	6m 48s
xmlsoft-head (windows)	10m 50s
jruby-head	1m 11s
xmlsoft-head (macos)	2m 11s
ruby-head (windows, disable)	1m 0s
ruby-head (ubuntu, enable)	2m 14s
ruby-head (windows, enable)	1m 11s
truffleruby-head (--disable-system-libraries --disable-static)	2m 44s
ruby-head (ubuntu, disable)	3m 4s
ruby-head (macos, enable)	41s
truffleruby-head (--disable-system-libraries --enable-static)	2m 47s
truffleruby-head (--enable-system-libraries)	3m 28s
ruby-head (macos, disable)	52s
	48m 22s

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