Suppress 2 DepthStencilFormatsTest.DepthStencilReadback on MacMini8.1

DepthStencilFormatsTest.DepthStencilReadback_Float/ES2_OpenGL
DepthStencilFormatsTest.DepthStencilReadback_UInt/ES2_OpenGL

Bug: angleproject:5269
Change-Id: I223c80d8c8ac47176d5a4ecdff34f6ce27286284
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2508971
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

Author: y-novikov

src/tests/gl_tests/DepthStencilFormatsTest.cpp

@@ -416,6 +416,9 @@ TEST_P(DepthStencilFormatsTest, DepthStencilReadback_UShort)
 // This test will initialize a depth texture, clear it and read it back, if possible
 TEST_P(DepthStencilFormatsTest, DepthStencilReadback_UInt)
 {
+    // http://anglebug.com/5269
+    ANGLE_SKIP_TEST_IF(IsOSX() && IsIntelUHD630Mobile() && IsDesktopOpenGL());
+
     GLuint fakeData[10]    = {0};
     ReadbackTestParam type = {
         GL_DEPTH_ATTACHMENT, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, fakeData, 16, 0};
@@ -425,6 +428,9 @@ TEST_P(DepthStencilFormatsTest, DepthStencilReadback_UInt)
 // This test will initialize a depth texture, clear it and read it back, if possible
 TEST_P(DepthStencilFormatsTest, DepthStencilReadback_Float)
 {
+    // http://anglebug.com/5269
+    ANGLE_SKIP_TEST_IF(IsOSX() && IsIntelUHD630Mobile() && IsDesktopOpenGL());
+
     GLuint fakeData[10]    = {0};
     ReadbackTestParam type = {GL_DEPTH_ATTACHMENT, GL_DEPTH_COMPONENT, GL_FLOAT, fakeData, 32, 0};
     depthStencilReadbackCase(type);