Clear up the .gitignore file
Clear up the .gitignore file

1.Remove duplicate items
2.Sort to alphabetical order
3.Remove "*.sw[po]" instead "*.swp" and "*.swo" for pass
bundling test.

Fixes: bug #1039898
Change-Id: Id8e03ecce6d2ab6d823a992a3a225b5ceb44aa80

n0ano/gantt,n0ano/gantt