Enable BWE logging to command line when rtc_enable_bwe_test_logging is set to true

webrtc/modules/bitrate_controller/bitrate_controller.gypi

Index: webrtc/modules/bitrate_controller/bitrate_controller.gypi
diff --git a/webrtc/modules/bitrate_controller/bitrate_controller.gypi b/webrtc/modules/bitrate_controller/bitrate_controller.gypi
index 3d86f2e32a17a83be809fc03e889e41933d1a4eb..82121cdddf88bde2f2bbb2c0633809184a8522d6 100644
--- a/webrtc/modules/bitrate_controller/bitrate_controller.gypi
+++ b/webrtc/modules/bitrate_controller/bitrate_controller.gypi
@@ -21,6 +21,13 @@
         'send_side_bandwidth_estimation.cc',
         'send_side_bandwidth_estimation.h',
       ],
+      'conditions': [
+        ['enable_bwe_test_logging==1', {
+          'defines': [ 'BWE_TEST_LOGGING_COMPILE_TIME_ENABLE=1' ],
+        }, {
+          'defines': [ 'BWE_TEST_LOGGING_COMPILE_TIME_ENABLE=0' ],
+        }],
+      ],
       # TODO(jschuh): Bug 1348: fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },