GN: Support building liblouis library

build/config/nacl/rules.gni

 # Copyright 2015 The Native Client 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/features.gni")
 import("//build/config/nacl/config.gni")
 
 # Generate a nmf file
 #
 # Native Client Manifest (nmf) is a JSON file that tells the browser where to
@@ skipping 16 matching lines @@
                            [
                              "deps",
                              "data_deps",
                              "executables",
                              "lib_prefix",
                              "nmf",
                              "nmfflags",
                              "public_deps",
                              "stage_dependencies",
                              "testonly",
+                             "visibility",
                            ])
 
     # TODO(phosek): Remove this conditional once
     # https://bugs.chromium.org/p/nativeclient/issues/detail?id=4339 is
     # resolved.
     if (current_cpu == "pnacl") {
       objdump = rebase_path("${nacl_toolchain_bindir}/x86_64-nacl-objdump")
     } else {
       objdump = rebase_path("${nacl_toolprefix}objdump")
     }
@@ skipping 98 matching lines @@
     } else {
       arch = target_cpu
     }
     args = [
       "--program=" + rebase_path(executable, root_build_dir),
       "--arch=${arch}",
       "--output=" + rebase_path(nmf, root_build_dir),
     ]
   }
 }