[co19] Roll co19 to 9c07e26d67665de7972ba6f7e87369933a978545

2020-09-01 irina.arkhipets@gmail.com Fixes 928: nonfunction-type-aliases option added.
2020-09-01 sgrekhov@unipro.ru Set literals tests failures fixed
2020-09-01 sgrekhov@unipro.ru Test fixed to not to be racy
2020-09-01 sgrekhov@unipro.ru Float32List.join() and Float32x4List tests fixed. Use correct float values
2020-08-31 sgrekhov@unipro.ru typed_data tests fixed and issue numbers added
2020-08-31 irina.arkhipets@gmail.com 916: LibTest\Spread-collections tests adopted for null safety.

Change-Id: Id62b90a2cf84738aaba0217764e9b01164f7109a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/161482
Reviewed-by: Jonas Termansen <sortie@google.com>

Author: whesse

DEPS

@@ -44,7 +44,7 @@ vars = {
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes. It requires access to the dart-build-access group, which EngProd
   # has.
-  "co19_rev": "12855e59cd7e031d076cc8cece9f5ee08e77ca8c",
+  "co19_rev": "9c07e26d67665de7972ba6f7e87369933a978545",
   "co19_2_rev": "e48b3090826cf40b8037648f19d211e8eab1b4b6",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal