Disable failing modules_unittests for UBSan.

BUG=webrtc:5820
TBR=pbos@webrtc.org

Review URL: https://codereview.webrtc.org/1915813002 .

Cr-Commit-Position: refs/heads/master@{#12482}

webrtc/modules/audio_processing/test/debug_dump_test.cc

@@ -262,6 +262,8 @@ void DebugDumpTest::VerifyDebugDump(const std::string& in_filename) {
   }
 }
 
+// Disabled for UBSan: https://bugs.chromium.org/p/webrtc/issues/detail?id=5820
+#ifndef UNDEFINED_SANITIZER
 TEST_F(DebugDumpTest, SimpleCase) {
   Config config;
   DebugDumpGenerator generator(config);
@@ -525,5 +527,7 @@ TEST_F(DebugDumpTest, TransientSuppressionOn) {
   VerifyDebugDump(generator.dump_file_name());
 }
 
+#endif  // !UNDEFINED_SANITIZER
+
 }  // namespace test
 }  // namespace webrtc