VBO test is a known failure

	modified:   knownfailures.txt

Change-Id: Ie30a4cc22c6ae1af4ad19dedee3df539c187d63e
diff --git a/tests/expectations/knownfailures.txt b/tests/expectations/knownfailures.txt
index 0d4f101..1992b11 100644
--- a/tests/expectations/knownfailures.txt
+++ b/tests/expectations/knownfailures.txt
@@ -1,2 +1,6 @@
 [
+{
+  name: "android.openglperf.cts.GlVboPerfTest#testVboWithVaryingIndexBufferNumbers",
+  bug: 6950385
+}
 ]