upstream #1044

Job	Run time
xmlsoft-head (ubuntu)	3m 46s
xmlsoft-head (windows)	11m 24s
xmlsoft-head-valgrind	6m 27s
xmlsoft-head (macos)	4m 3s
ruby-head-valgrind (disable)	7m 40s
ruby-head (ubuntu, enable)	2m 54s
ruby-head (ubuntu, disable)	50s
html5lib-tests	59s
ruby-head (windows, enable)	3m 13s
jruby-head	1m 21s
ruby-head (windows, disable)	5m 15s
ruby-head (macos, enable)	2m 42s
truffleruby-head (--disable-system-libraries --disable-static)	5m 19s
ruby-head (macos, disable)	1m 8s
truffleruby-head (--disable-system-libraries --enable-static)	3m 6s
truffleruby-head (--enable-system-libraries)	2m 46s
	1h 2m 53s

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