Revert of Make base a static ibrary

mojo/public/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 group("public") {
   # Meta-target, don't link into production code.
   testonly = true
   deps = [
+    ":libmojo_sdk",
     ":sdk",
     "cpp/bindings",
     "cpp/environment:standalone",
     "cpp/utility",
     "interfaces/bindings/tests:test_interfaces",
   ]
 
   if (is_android) {
     deps += [
       "java:bindings",
       "java:system",
     ]
   }
 }
 
 group("sdk") {
   deps = [
     "c/system",
     "cpp/bindings",
     "cpp/environment:standalone",
     "cpp/utility",
     "interfaces/bindings",
     "js",
   ]
 }
+
+static_library("libmojo_sdk") {
+  complete_static_lib = true
+  deps = [
+    ":sdk",
+  ]
+}