Always install sed and awk

sed and awk is heavily used everywhere in the code, but it's not
explicitely installed by kdump dracut module. If the module in dracut
stop installing them (which already happened with latest dracut
upstream), kdump will break.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>

dracut-module-setup.sh

@@ -819,6 +819,8 @@ install() {
     inst "/bin/sync" "/bin/sync"
     inst "/bin/cut" "/bin/cut"
     inst "/bin/head" "/bin/head"
+    inst "/bin/awk" "/bin/awk"
+    inst "/bin/sed" "/bin/sed"
     inst "/sbin/makedumpfile" "/sbin/makedumpfile"
     inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg"
     inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"