[remote debugging] Merge wiki info

Merge information from the wiki page about remote debugging:

https://crosswalk-project.org/#wiki/Remote-Debugging-on-Android

into the main website.

Fixes https://crosswalk-project.org/jira/browse/XWALK-2167
Merge pull request #141 from crosswalk-project/remote-debug-2167

[remote debugging] Merge wiki info