boards/sltb001a: reset before flashing
boards/sltb001a: reset before flashing

When it was running 'hello-world', the board could not be flashed through
JLinkExe anymore and only through the drag and drop support.

By resetting the board before doing 'loadbin' it can now be flashed
properly.

mtausig/RIOT,OTAkeys/RIOT,mtausig/RIOT,kaspar030/RIOT,kYc0o/RIOT,aeneby/RIOT,ant9000/RIOT,jasonatran/RIOT,kaspar030/RIOT,smlng/RIOT,basilfx/RIOT,josephnoir/RIOT,mfrey/RIOT,yogo1212/RIOT,cladmi/RIOT,ant9000/RIOT,mfrey/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,basilfx/RIOT,josephnoir/RIOT,basilfx/RIOT,toonst/RIOT,kYc0o/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,x3ro/RIOT,miri64/RIOT,mfrey/RIOT,ant9000/RIOT,jasonatran/RIOT,authmillenon/RIOT,basilfx/RIOT,x3ro/RIOT,mfrey/RIOT,toonst/RIOT,josephnoir/RIOT,cladmi/RIOT,aeneby/RIOT,smlng/RIOT,rfuentess/RIOT,x3ro/RIOT,josephnoir/RIOT,cladmi/RIOT,miri64/RIOT,mfrey/RIOT,rfuentess/RIOT,mtausig/RIOT,x3ro/RIOT,authmillenon/RIOT,smlng/RIOT,mtausig/RIOT,smlng/RIOT,OTAkeys/RIOT,jasonatran/RIOT,yogo1212/RIOT,toonst/RIOT,OlegHahm/RIOT,ant9000/RIOT,toonst/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,jasonatran/RIOT,authmillenon/RIOT,OTAkeys/RIOT,kaspar030/RIOT,authmillenon/RIOT,basilfx/RIOT,cladmi/RIOT,yogo1212/RIOT,aeneby/RIOT,miri64/RIOT,yogo1212/RIOT,miri64/RIOT,toonst/RIOT,OlegHahm/RIOT,kYc0o/RIOT,aeneby/RIOT,ant9000/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,miri64/RIOT,aeneby/RIOT,OlegHahm/RIOT,yogo1212/RIOT,rfuentess/RIOT,authmillenon/RIOT,authmillenon/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,smlng/RIOT,OlegHahm/RIOT,josephnoir/RIOT,x3ro/RIOT,kYc0o/RIOT,mtausig/RIOT,kaspar030/RIOT,cladmi/RIOT,yogo1212/RIOT,kYc0o/RIOT