Add SimpleSignatureTest#testSignature to knownfailures

To be added later on if it makes sense

Bug: 11436500
Change-Id: I7156ced5a5f664cec3ff8873d792df8028e954e4
diff --git a/tests/expectations/knownfailures.txt b/tests/expectations/knownfailures.txt
index 9d28c34..abe53f4 100644
--- a/tests/expectations/knownfailures.txt
+++ b/tests/expectations/knownfailures.txt
@@ -8,6 +8,10 @@
   bug: 8148617
 },
 {
+  name: "android.tests.sigtest.SimpleSignatureTest.testSignature",
+  bug: 11436500
+},
+{
   name: "android.nativeopengl.EGLCleanupTest#TestCorrect",
   name: "android.nativeopengl.EGLCreateContextTest#BadAttributeFails",
   bug: 11652564