Skip some co19 tests on Mips that take too much memory.

tests/co19/co19-runtime.status

Index: tests/co19/co19-runtime.status
diff --git a/tests/co19/co19-runtime.status b/tests/co19/co19-runtime.status
index 49deb89cc4f3644f4519b6d7853d62217e17b181..fb3114ea0855ff77b4cc000822d01d4f2d682a89 100644
--- a/tests/co19/co19-runtime.status
+++ b/tests/co19/co19-runtime.status
@@ -63,7 +63,12 @@ LibTest/core/int/operator_left_shift_A01_t02: Fail # co19 issue 129
 [ $compiler == none && $runtime == vm && $arch == mips ]
 LibTest/math/log_A01_t01: Fail
 LibTest/core/double/toInt_A01_t01: Fail
-Libtest/core/List/List_class_A01_t01: Skip # Uses > 300 MB memory on 1 GB slave.
+
+# These tests take too much memory (300 MB) for our 1 GB test machine.
+# co19 issue 673. http://code.google.com/p/co19/issues/detail?id=673
+LibTest/core/List/List_class_A01_t01: Skip # co19 issue 673
+LibTest/collection/ListMixin/ListMixin_class_A01_t01: Skip # co19 issue 673
+LibTest/collection/ListBase/ListBase_class_A01_t01: Skip # co19 issue 673
 
 [ $compiler == none && $runtime == vm && ($arch == simarm || $arch == simmips) ]
 LibTest/core/Uri/Uri_A06_t03: Skip # Timeouts, co19-roll r576: Please triage this failure