add some papers

[pnigos]

there are some android security papers and some of them wrote in chinese :)
http://www.80vul.com/android/data-clone.txt
http://www.80vul.com/webzine_0x06/PSTZine_0x06_0x06.txt
http://www.80vul.com/webzine_0x06/PSTZine_0x06_0x05.txt
http://www.80vul.com/webzine_0x06/PSTZine_0x06_0x04.txt

[jduck]

Hi. Do you think you could add them to the /wiki/index.md and send a pull request?