[configs/releng] Add usb_modeswitch and wvdial to live-env

Implements FS#31054

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

configs/releng/packages.i686

@@ -43,8 +43,10 @@ smartmontools
 speedtouch
 systemd
 tcpdump
+usb_modeswitch
 vpnc
 wireless_tools
 wpa_actiond
+wvdial
 zd1211-firmware
 zsh

configs/releng/packages.x86_64

@@ -44,8 +44,10 @@ smartmontools
 speedtouch
 systemd
 tcpdump
+usb_modeswitch
 vpnc
 wireless_tools
 wpa_actiond
+wvdial
 zd1211-firmware
 zsh