Bug 1432869 - Add loopback gtest to cubeb's update.sh. r=achronop

MozReview-Commit-ID: 1SQKMD80CG7

--HG--
extra : rebase_source : 5eb747607b1587676ff0e2fc8082655ae5648934

media/libcubeb/update.sh

@@ -42,6 +42,7 @@ cp $1/test/test_audio.cpp gtest
 cp $1/test/test_devices.cpp gtest
 cp $1/test/test_duplex.cpp gtest
 cp $1/test/test_latency.cpp gtest
+cp $1/test/test_loopback.cpp gtest
 cp $1/test/test_mixer.cpp gtest
 cp $1/test/test_overload_callback.cpp gtest
 cp $1/test/test_record.cpp gtest