Allow the mojo shell to run on android.

build/android/gyp/write_ordered_libraries.py

Index: build/android/gyp/write_ordered_libraries.py
diff --git a/build/android/gyp/write_ordered_libraries.py b/build/android/gyp/write_ordered_libraries.py
index dcb5064cf28caaea59cb2f1c72a10d2984411871..17744906a3eca9213470b34081a7a95914d5d527 100755
--- a/build/android/gyp/write_ordered_libraries.py
+++ b/build/android/gyp/write_ordered_libraries.py
@@ -106,11 +106,12 @@ def main():
   _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)