Use -Werror in external/jemalloc am: 033b6fda4a am: 882e73dec8
am: 61d1c49922

Change-Id: I52a1406dbb744da7a1b714d6cad432c8b3231889
diff --git a/Android.bp b/Android.bp
index f59a653..0dd1e94 100644
--- a/Android.bp
+++ b/Android.bp
@@ -19,6 +19,7 @@
     "-O3",
     "-funroll-loops",
     "-fvisibility=hidden",
+    "-Werror",
     "-Wno-unused-parameter",
     "-Wno-type-limits",
 ]