servo: Merge #1531 - added vim tmp files to git ignore (from ibnc:git_ignore_vim); r=larsbergstrom

For me and fellow vim users.

Source-Repo: https://github.com/servo/servo
Source-Revision: 1ee52244860cc27c35dc65cc265f4bc3b9fe2d52

servo/.gitignore

@@ -8,6 +8,8 @@
 *.dummy
 *.pkl
 *.pyc
+*.swp
+*.swo
 servo-test
 Makefile
 Servo.app