[co19] Roll co19 to 826fba7da0ec78f93989b5104e91e46a3ecc52d0

2020-08-27 sgrekhov@unipro.ru Process.stderr, stdout and stdin tests refactored
2020-08-26 sgrekhov@unipro.ru Tryjob failures fixed for IO tests

Change-Id: Ibbe99fe34ff3308ce0c587f963126b48690c9b06
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/160520
Reviewed-by: William Hesse <whesse@google.com>
diff --git a/DEPS b/DEPS
index 98aeca7..6a63c4a 100644
--- a/DEPS
+++ b/DEPS
@@ -44,7 +44,7 @@
   # 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": "741384c83190cdaa648bf77aefcf4b6c0ec75988",
+  "co19_rev": "826fba7da0ec78f93989b5104e91e46a3ecc52d0",
   "co19_2_rev": "e48b3090826cf40b8037648f19d211e8eab1b4b6",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal