Description of problem: 
then someone tries to work with large erlang projects (containing header-files)
he realises that although erl-files are properly highlighting, hrl-files are not.


Version-Release number of selected component (if applicable):
vim-common-7.1.135-1.fc8


How reproducible: 
always


Steps to Reproduce: 
1. vim test.hrl
  
Actual results:
no highlighting

Expected results:
Highlighted as erl-files.

Additional info: easy to fix - just add proper file extension to
/usr/share/vim/vim71/filetype.vim (see patch)