Update API for Objective-C RTCConfiguration.

BUG=

Review URL: https://codereview.webrtc.org/1616303002

Cr-Commit-Position: refs/heads/master@{#11386}
diff --git a/webrtc/api/api_tests.gyp b/webrtc/api/api_tests.gyp
index c2c18bc..f073cea 100644
--- a/webrtc/api/api_tests.gyp
+++ b/webrtc/api/api_tests.gyp
@@ -19,6 +19,7 @@
             '<(webrtc_root)/base/base_tests.gyp:rtc_base_tests_utils',
           ],
           'sources': [
+            'objctests/RTCConfigurationTest.mm',
             'objctests/RTCIceCandidateTest.mm',
             'objctests/RTCIceServerTest.mm',
             'objctests/RTCMediaConstraintsTest.mm',