Merge pull request #4937 from haukepetersen/opt_boards_usejlink

boards/openmote-cc2538/Makefile.include

boards/openmote-cc2538/dist/debug.sh

boards/openmote-cc2538/dist/flash.sh

boards/openmote-cc2538/dist/reset.sh

boards/pca10000/Makefile.include

boards/pca10000/dist/debug.sh

boards/pca10000/dist/flash.sh

boards/pca10000/dist/reset.sh

boards/pca10005/Makefile.include

boards/pca10005/dist/debug.sh

boards/pca10005/dist/flash.sh

boards/pca10005/dist/reset.sh

dist/tools/jlink/jlink.sh