patch 8.2.0320: no Haiku support

Problem:    No Haiku support.
Solution:   Add support for Haiku. (Emir Sari, closes #5605)
diff --git a/runtime/gvimrc_example.vim b/runtime/gvimrc_example.vim
index cc3e791..083dace 100644
--- a/runtime/gvimrc_example.vim
+++ b/runtime/gvimrc_example.vim
@@ -6,10 +6,11 @@
 " Last change:	2016 Apr 05
 "
 " To use it, copy it to
-"	       for Unix:  ~/.gvimrc
-"	      for Amiga:  s:.gvimrc
-"  for MS-DOS and Win32:  $VIM\_gvimrc
-"	    for OpenVMS:  sys$login:.gvimrc
+"         for Unix:  ~/.gvimrc
+"        for Amiga:  s:.gvimrc
+"   for MS-Windows:  $VIM\_gvimrc
+"        for Haiku:  ~/config/settings/vim/gvimrc
+"      for OpenVMS:  sys$login:.gvimrc
 
 " Make external commands work through a pipe instead of a pseudo-tty
 "set noguipty