[Tizen] Fix Tizen app executable path length and launcher symbol link name issues

Issues:
1. Tizen AUL will parse /proc/*/cmdline to retrieve the application ID, however
current launcher symbol link set its name to Crosswalk app ID instead of Tizen
app ID.
2. Tizen AUL can only handles proc/*/cmdline with a max 128 bytes length buffer,
however current generated app ID and the whole path can easily surpass this
limitation.

Solution:
new-tizen-app-id = "xwalk." + $crosswalk-app-id
new-app-exe-path = /home/app/.config/xwalk-service/applications/$crosswalk-app-id/bin/$new-tizen-app-id

BUG=XWALK-1434,XWALK-1435
https://crosswalk-project.org/jira/browse/XWALK-1434
https://crosswalk-project.org/jira/browse/XWALK-1435