Add twig performance degradation patch. #1061

Job	Run time
lint_theme	35s
test_phpunit	1m 47s
set_sites	58s
test_new_site	13m 17s
test_existing_site (aaas)	9m 10s
test_existing_site (cesta)	8m 0s
test_existing_site (creees)	8m 18s
test_existing_site (english)	10m 3s
test_existing_site (ethicsinsociety)	8m 49s
test_existing_site (hs_traditional)	8m 32s
test_existing_site (iriss)	9m 40s
test_existing_site (popstudies)	6m 16s
test_existing_site (sitp)	10m 30s
test_existing_site (statistics)	10m 52s
deploy_branch	1m 47s
	1h 48m 34s

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