Migrated GN target :neteq_pcmu_quality_test

Migrated GN target :neteq_pcmu_quality_test from
webrtc/modules/audio_coding/neteq/neteq_tests.gypi

NOTRY=True

BUG=webrtc:6190

Review-Url: https://codereview.webrtc.org/2224313002
Cr-Commit-Position: refs/heads/master@{#13711}

webrtc/modules/audio_coding/BUILD.gn

@@ -1460,4 +1460,21 @@ if (rtc_include_tests) {
       "//third_party/gflags",
     ]
   }
+
+  executable("neteq_pcmu_quality_test") {
+    testonly = true
+
+    sources = [
+      "neteq/test/neteq_pcmu_quality_test.cc",
+    ]
+
+    deps = [
+      ":g711",
+      ":neteq",
+      ":neteq_test_support",
+      "../../test:test_support_main",
+      "//testing/gtest",
+      "//third_party/gflags",
+    ]
+  }
 }