Added missing unittest to the modules/BUILD.gn build file
Added missing unittest to the modules/BUILD.gn build file

NOTRY=True

BUG=

Review-Url: https://codereview.webrtc.org/2255093002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13813}

ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc