vim: Add cmd:vi

As we have no package providing vi, vim should provide it.

app-editors/vim/vim-7.4.recipe

@@ -14,7 +14,7 @@ HOMEPAGE="http://www.vim.org"
 SRC_URI="ftp://ftp.vim.org/pub/vim/unix/vim-7.4.tar.bz2"
 COPYRIGHT="Bram Moleenar et al."
 LICENSE="Vim"
-REVISION="1"
+REVISION="2"
 CHECKSUM_SIZE="9843297"
 CHECKSUM_MD5="607e135c559be642f210094ad023dc65"
 CHECKSUM_RMD160="f23f62dccdbf84cbf907a0cd38c7077a87e764ee"
@@ -31,6 +31,7 @@ PROVIDES="
 	cmd:rgvim = $portVersion
 	cmd:rview = $portVersion
 	cmd:rvim = $portVersion
+	cmd:vi = $portVersion
 	cmd:vim = $portVersion
 	cmd:vimdiff = $portVersion
 	cmd:vimtutor = $portVersion
@@ -77,4 +78,6 @@ INSTALL()
 
 	# Make arrow keys, backspace, delete, etc behave as expected.
 	echo "set nocompatible" > $dataDir/vim/vimrc
+
+	ln -s vim $binDir/vi
 }