Disable test due to toybox update.

bug:26395656
Change-Id: I0356bf0e5fff3cab198f6c91da097ff0de564c89
diff --git a/tools/libcore_failures.txt b/tools/libcore_failures.txt
index 880be26..e29bcf3 100644
--- a/tools/libcore_failures.txt
+++ b/tools/libcore_failures.txt
@@ -248,6 +248,12 @@
   modes_variants: [[device, X32]],
   names: ["org.apache.harmony.tests.java.text.DecimalFormatTest#test_formatDouble_withFieldPosition",
           "org.apache.harmony.tests.java.text.DecimalFormatTest#test_formatToCharacterIterator_original"]
+},
+{
+  description: "'cat -' does not work anymore",
+  result: EXEC_FAILED,
+  bug: 26395656,
+  modes: [device],
+  names: ["org.apache.harmony.tests.java.lang.ProcessTest#test_getOutputStream"]
 }
-
 ]