Allow the mojo shell to run on android.

build/android/gyp/write_ordered_libraries.py

 #!/usr/bin/env python
 #
 # Copyright 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.
 
 """Writes dependency ordered list of native libraries.
 
 The list excludes any Android system libraries, as those are not bundled with
 the APK.
@@ skipping 88 matching lines @@
   parser.add_option('--libraries-dir',
       help='The directory which contains shared libraries.')
   parser.add_option('--readelf', help='Path to the readelf binary.')
   parser.add_option('--output', help='Path to the generated .json file.')
   parser.add_option('--stamp', help='Path to touch on success.')
 
   global _options
   _options, _ = parser.parse_args()
 
   libraries = build_utils.ParseGypList(_options.input_libraries)
-  if libraries[0].endswith('.so'):
-    libraries = [os.path.basename(lib) for lib in libraries]
-    libraries = GetSortedTransitiveDependencies(libraries)
-  else:
-    libraries = GetSortedTransitiveDependenciesForExecutable(libraries[0])
+  if len(libraries):
+    if libraries[0].endswith('.so'):
+      libraries = [os.path.basename(lib) for lib in libraries]
+      libraries = GetSortedTransitiveDependencies(libraries)
+    else:
+      libraries = GetSortedTransitiveDependenciesForExecutable(libraries[0])
 
   build_utils.WriteJson(libraries, _options.output, only_if_changed=True)
 
   if _options.stamp:
     build_utils.Touch(_options.stamp)
 
 
 if __name__ == '__main__':
   sys.exit(main())