makefile.iotlab.single: add 'info-iotlab-node' target
makefile.iotlab.single: add 'info-iotlab-node' target

Add a target to show the value of IOTLAB_NODE. Can be used to get the result of
using IOTLAB_NODE=auto or IOTLAB_NODE=auto-ssh.

biboc/RIOT,OTAkeys/RIOT,mfrey/RIOT,neiljay/RIOT,x3ro/RIOT,lazytech-org/RIOT,toonst/RIOT,neiljay/RIOT,biboc/RIOT,biboc/RIOT,RIOT-OS/RIOT,smlng/RIOT,ant9000/RIOT,ant9000/RIOT,authmillenon/RIOT,kbumsik/RIOT,kaspar030/RIOT,basilfx/RIOT,authmillenon/RIOT,mfrey/RIOT,neiljay/RIOT,yogo1212/RIOT,kbumsik/RIOT,BytesGalore/RIOT,OlegHahm/RIOT,gebart/RIOT,aeneby/RIOT,biboc/RIOT,rfuentess/RIOT,yogo1212/RIOT,gebart/RIOT,toonst/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,gebart/RIOT,kYc0o/RIOT,jasonatran/RIOT,basilfx/RIOT,josephnoir/RIOT,OTAkeys/RIOT,ant9000/RIOT,avmelnikoff/RIOT,ant9000/RIOT,miri64/RIOT,authmillenon/RIOT,rfuentess/RIOT,rfuentess/RIOT,kYc0o/RIOT,cladmi/RIOT,mfrey/RIOT,kbumsik/RIOT,toonst/RIOT,aeneby/RIOT,lazytech-org/RIOT,lazytech-org/RIOT,A-Paul/RIOT,rfuentess/RIOT,basilfx/RIOT,neiljay/RIOT,avmelnikoff/RIOT,smlng/RIOT,yogo1212/RIOT,ant9000/RIOT,josephnoir/RIOT,yogo1212/RIOT,BytesGalore/RIOT,OlegHahm/RIOT,kbumsik/RIOT,basilfx/RIOT,basilfx/RIOT,mtausig/RIOT,toonst/RIOT,rfuentess/RIOT,aeneby/RIOT,RIOT-OS/RIOT,cladmi/RIOT,josephnoir/RIOT,neiljay/RIOT,mfrey/RIOT,kbumsik/RIOT,OlegHahm/RIOT,yogo1212/RIOT,mtausig/RIOT,aeneby/RIOT,toonst/RIOT,x3ro/RIOT,lazytech-org/RIOT,kaspar030/RIOT,cladmi/RIOT,avmelnikoff/RIOT,authmillenon/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,smlng/RIOT,kaspar030/RIOT,avmelnikoff/RIOT,mtausig/RIOT,authmillenon/RIOT,x3ro/RIOT,BytesGalore/RIOT,BytesGalore/RIOT,OlegHahm/RIOT,gebart/RIOT,miri64/RIOT,smlng/RIOT,jasonatran/RIOT,jasonatran/RIOT,jasonatran/RIOT,x3ro/RIOT,kYc0o/RIOT,OTAkeys/RIOT,biboc/RIOT,A-Paul/RIOT,josephnoir/RIOT,yogo1212/RIOT,authmillenon/RIOT,x3ro/RIOT,kYc0o/RIOT,OTAkeys/RIOT,mfrey/RIOT,miri64/RIOT,A-Paul/RIOT,miri64/RIOT,avmelnikoff/RIOT,cladmi/RIOT,josephnoir/RIOT,BytesGalore/RIOT,smlng/RIOT,OlegHahm/RIOT,A-Paul/RIOT,cladmi/RIOT,jasonatran/RIOT,aeneby/RIOT,mtausig/RIOT,lazytech-org/RIOT,miri64/RIOT,A-Paul/RIOT,mtausig/RIOT,gebart/RIOT,OTAkeys/RIOT,kaspar030/RIOT