Link libc++ statically

Test: bit statsd_test:*
Test: bit libstatssocket_test:*
Test: bit libstatspull_test:*
Bug: 153349659
Change-Id: Ief3d0e062ed3e5cabf5b8b6198510caf3f64eefd
diff --git a/libstats/socket/Android.bp b/libstats/socket/Android.bp
index b02ab42..c86d650 100644
--- a/libstats/socket/Android.bp
+++ b/libstats/socket/Android.bp
@@ -54,6 +54,7 @@
             },
         },
     },
+    stl: "libc++_static",
 
     // enumerate stable entry points for APEX use
     stubs: {