Suppress clip distance tests on iOS

Bug: angleproject:4452
Bug: angleproject:7768
Change-Id: Iabea037ded6ee3cfa0c325c59099772ac6adbbc6
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3963134
Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
diff --git a/src/tests/angle_end2end_tests_expectations.txt b/src/tests/angle_end2end_tests_expectations.txt
index 5b59636..103f1b5 100644
--- a/src/tests/angle_end2end_tests_expectations.txt
+++ b/src/tests/angle_end2end_tests_expectations.txt
@@ -665,6 +665,13 @@
 5491 IOS : IOSurfaceClientBufferTest.MakeCurrent/ES2_OpenGL = SKIP
 5491 IOS : IOSurfaceClientBufferTest.MakeCurrent/ES3_OpenGL = SKIP
 
+7768 IOS : ClipDistanceTest.OneClipDistance/ES2_OpenGL = SKIP
+7768 IOS : ClipDistanceTest.OneClipDistance/ES3_OpenGL = SKIP
+7768 IOS : ClipDistanceTest.ThreeClipDistances/ES2_OpenGL = SKIP
+7768 IOS : ClipDistanceTest.ThreeClipDistances/ES3_OpenGL = SKIP
+7768 IOS : ClipDistanceTest.ThreeClipDistancesRedeclared/ES2_OpenGL = SKIP
+7768 IOS : ClipDistanceTest.ThreeClipDistancesRedeclared/ES3_OpenGL = SKIP
+
 // Test is disabled as it only pertains to desktop GLSL
 6197 : GLSLTest_ES31.InterpolateAtWithSwizzle/* = SKIP