Mark two triaged co19-tests with issue number

tests/co19/co19-dart2js.status

Index: tests/co19/co19-dart2js.status
diff --git a/tests/co19/co19-dart2js.status b/tests/co19/co19-dart2js.status
index 92ccffde42ad25c4b7971ea31834c4f9fdd257c0..9f63860ba7bd78c90f7f5118b7df1aa4e5ad93ef 100644
--- a/tests/co19/co19-dart2js.status
+++ b/tests/co19/co19-dart2js.status
@@ -449,6 +449,8 @@ Language/14_Libraries_and_Scripts/1_Imports_A03_t30: fail # co19 issue 723
 Language/15_Types/4_Interface_Types_A11_t01: crash # Issue 21174
 Language/15_Types/4_Interface_Types_A11_t02: crash # Issue 21174
 Language/15_Types/4_Interface_Types_A12_t10: fail # co19 issue 716
+LibTest/convert/JsonCodec/encode_A01_t01: RuntimeError # code.google.com/p/co19/issues/detail?id=735
+LibTest/convert/JsonCodec/encode_A01_t02: RuntimeError # code.google.com/p/co19/issues/detail?id=735
 LibTest/core/DateTime/DateTime_A01_t03: fail # co19-roll r546: Please triage this failure
 LibTest/core/DateTime/parse_A03_t01: fail # co19-roll r546: Please triage this failure
 LibTest/core/Duration/operator_div_A01_t01: fail # co19-roll r546: Please triage this failure
@@ -628,8 +630,6 @@ LibTest/math/pow_A16_t01: fail # co19-roll r587: Please triage this failure
 
 LibTest/async/Stream/handleError_A04_t01: RuntimeError # co19-roll r641: Please triage this failure
 LibTest/async/Stream/listen_A05_t01: RuntimeError # co19-roll r641: Please triage this failure
-LibTest/convert/JsonCodec/encode_A01_t01: RuntimeError # co19-roll r641: Please triage this failure
-LibTest/convert/JsonCodec/encode_A01_t02: RuntimeError # co19-roll r641: Please triage this failure
 
 [ $compiler == dart2js && $runtime == d8 && $system == windows ]
 LibTest/async/DeferredLibrary/*: Skip # Issue 17458