[Runtime] Fix some coding style issues reported by lint.py.

runtime/app/android/xwalk_main_delegate_android.cc:60:  Lines should be <= 80 characters long  [whitespace/line_length] [2]
runtime/renderer/android/xwalk_render_view_ext.cc:37:  Lines should be <= 80 characters long  [whitespace/line_length] [2]
Merge pull request #1709 from rakuco/lint-nitpicks

[Runtime] Fix some coding style issues reported by lint.py.