[Vim] Set line margin at 120th char.

Change-Id: I05ba47a730da93534f53ae67bc3adfe9bb90eb64
Signed-off-by: Wei-Chung Wen <morisato3711@gmail.com>
[Vim] Set path to cscope.

Signed-off-by: Wei-Chung Wen <morisato3711@gmail.com>
Merge branch 'master' into MacBookAir