Add NetEqPcmuQualityTest

This is virtually the same as NetEq{Isac,Opus}QualityTest but for PCMu.

BUG=2692
R=minyue@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/54379004

Cr-Commit-Position: refs/heads/master@{#9176}
diff --git a/webrtc/modules/audio_coding/neteq/neteq_tests.gypi b/webrtc/modules/audio_coding/neteq/neteq_tests.gypi
index 4dd392c..9fef49f 100644
--- a/webrtc/modules/audio_coding/neteq/neteq_tests.gypi
+++ b/webrtc/modules/audio_coding/neteq/neteq_tests.gypi
@@ -221,6 +221,22 @@
     },
 
     {
+      'target_name': 'neteq_pcmu_quality_test',
+      'type': 'executable',
+      'dependencies': [
+        'neteq',
+        'neteq_test_support',
+        'G711',
+        '<(DEPTH)/testing/gtest.gyp:gtest',
+        '<(DEPTH)/third_party/gflags/gflags.gyp:gflags',
+        '<(webrtc_root)/test/test.gyp:test_support_main',
+      ],
+      'sources': [
+        'test/neteq_pcmu_quality_test.cc',
+      ],
+    },
+
+    {
      'target_name': 'neteq_test_tools',
       # Collection of useful functions used in other tests.
       'type': 'static_library',