Remove vim plugin config file from .gitignore
Remove vim plugin config file from .gitignore

Files in be/ get wiped out by clean.sh if they're listed in .gitignore.
It is easier to just configure this via a project-specific .vimrc file.

Change-Id: I262f7a1ec8daace84a29518ba826c7c3b20fb9e9
Reviewed-on: http://gerrit.cloudera.org:8080/4854
Reviewed-by: Jim Apple <9e3620e7251463d214b5f536438d2c9ea899162d@cloudera.com>
Tested-by: Tim Armstrong <2f8e34250f03a653da3dc27f7ec203eafdde80fc@cloudera.com>

michaelhkw/incubator-impala,michaelhkw/incubator-impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala,cloudera/Impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,michaelhkw/incubator-impala,cloudera/Impala,michaelhkw/incubator-impala,cloudera/Impala