Add GN build targets for the rest of mojo/public

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/android/config.gni")
 if (cpu_arch == "arm") {
   import("//build/config/arm.gni")
 }
 if (is_posix) {
   import("//build/config/gcc/gcc_version.gni")
@@ skipping 272 matching lines @@
           "-B" + rebase_path("//build/android/arm-linux-androideabi-gold",
                              root_build_dir)
         ]
       } else {
         ldflags += [ "-fuse-ld=gold" ]
       }
     }
 
     ldflags += [
       "-Wl,--no-undefined",
-      # Don't export symbols from statically linked libraries.
-      "-Wl,--exclude-libs=ALL",
     ]
     if (cpu_arch == "arm") {
       ldflags += [
         # Enable identical code folding to reduce size.
         "-Wl,--icf=safe",
       ]
     }
 
     if (is_clang) {
       if (cpu_arch == "arm") {
@@ skipping 535 matching lines @@
   } else {
     cflags = [ "-g1" ]
   }
 }
 
 config("no_symbols") {
   if (!is_win) {
     cflags = [ "-g0" ]
   }
 }