cdef_test: fix uninitiated test failures

CDEFCopyRect8to16Test and CDEFCopyRect16to16Test with
-DAOM_TARGET_CPU=generic

Change-Id: I49189ed72ccda34ac7d7c970a3f21d7edcdbb921

test/cdef_test.cc

diff --git a/test/cdef_test.cc b/test/cdef_test.cc
index ee18f1e..5959dab 100644
--- a/test/cdef_test.cc
+++ b/test/cdef_test.cc
@@ -485,6 +485,7 @@
   CDEFCopyRect8To16 test_func_;
   CDEFCopyRect8To16 ref_func_;
 };
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(CDEFCopyRect8to16Test);
 
 using CDEFCopyRect16To16 = void (*)(uint16_t *dst, int dstride,
                                     const uint16_t *src, int sstride, int width,
@@ -567,6 +568,7 @@
   CDEFCopyRect16To16 test_func_;
   CDEFCopyRect16To16 ref_func_;
 };
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(CDEFCopyRect16to16Test);
 
 TEST_P(CDEFBlockTest, TestSIMDNoMismatch) {
   test_cdef(bsize, 1, cdef, ref_cdef, boundary, depth);