Build fixes for fnl/musl

mojo/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.
 
 import("//build/module_args/mojo.gni")
 import("//mojo/public/mojo.gni")
 
 declare_args() {
   mojo_use_go = false
 
   # TODO(ncbray): support ASAN once NaCl's GN build is unforked.
-  mojo_use_nacl = is_linux && !is_asan
-  mojo_use_nacl_nonsfi = (is_linux || is_android) && !is_asan
+  # TODO(cstout): support fnl/musl build in nacl
+  mojo_use_nacl = is_linux && !is_asan && !is_fnl
+  mojo_use_nacl_nonsfi = (is_linux || is_android) && !is_asan && !is_fnl
 }
 
 group("mojo") {
   # Meta-target, don't link into production code.
   testonly = true
   deps = [
     ":system_thunks",
     ":tests",
     "//mojo/common",
     "//mojo/dart",
@@ skipping 58 matching lines @@
   }
 }
 
 # This archives the system thunks implementation for exporting to SDK consumers.
 static_library("system_thunks") {
   complete_static_lib = true
   deps = [
     "//mojo/public/platform/native:system",
   ]
 }