Use -Werror in external/libopus am: 475b788b92 am: 93264cbc8c
am: 424d297041

Change-Id: I2ec607186c728ad48479e222391d07aeef5a092d
diff --git a/Android.bp b/Android.bp
index cd7e229..82f6a7c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -169,6 +169,8 @@
         "-DHAVE_LRINTF",
         "-O2",
         "-fno-math-errno",
+        "-Wall",
+        "-Werror",
     ],
     cppflags: [
         "-DBSD=1",