patch 8.2.0320: no Haiku support

Problem:    No Haiku support.
Solution:   Add support for Haiku. (Emir Sari, closes #5605)
diff --git a/runtime/vimrc_example.vim b/runtime/vimrc_example.vim
index 3017a6c..e11e4cf 100644
--- a/runtime/vimrc_example.vim
+++ b/runtime/vimrc_example.vim
@@ -7,6 +7,7 @@
 "	       for Unix:  ~/.vimrc
 "	      for Amiga:  s:.vimrc
 "	 for MS-Windows:  $VIM\_vimrc
+"	      for Haiku:  ~/config/settings/vim/vimrc
 "	    for OpenVMS:  sys$login:.vimrc
 
 " When started as "evim", evim.vim will already have done these settings, bail