[packages] add gnu grep

Signed-off-by: Peter Wagner <tripolar@gmx.at>


git-svn-id: svn://svn.openwrt.org/openwrt/packages@38542 3c298f89-4303-0410-b956-a3cf2f4a3e73
[packages] grep: simplify package remove


git-svn-id: svn://svn.openwrt.org/openwrt/packages@38543 3c298f89-4303-0410-b956-a3cf2f4a3e73