upstream #1023

Job	Run time
xmlsoft-head-valgrind	6m 29s
ruby-head (ubuntu, enable)	41s
ruby-head (ubuntu, disable)	1m 23s
html5lib-tests	52s
jruby-head	1m 1s
ruby-head (windows, enable)	3m 21s
ruby-head-valgrind (disable)	6m 32s
ruby-head (windows, disable)	3m 14s
ruby-head (macos, enable)	31s
truffleruby-head (--disable-system-libraries --disable-static)	3m 16s
xmlsoft-head (ubuntu)	1m 38s
ruby-head (macos, disable)	1m 23s
truffleruby-head (--disable-system-libraries --enable-static)	3m 0s
xmlsoft-head (windows)	10m 7s
truffleruby-head (--enable-system-libraries)	2m 25s
xmlsoft-head (macos)	1m 21s
	47m 14s

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