examples/browser/package.json: Add names to concurrent task
examples/browser/package.json: Add names to concurrent task

concurrently allows us to name the tasks, I think it helps a lot
understanding which output comes from where (and eventually filter/grep
it).

Signed-off-by: Simon Marchi <fa7054fed17d58b06d3b1bf9b1077e42165a09ec@ericsson.com>

lmcgupe/theia,hexa00/theia,epatpol/theia-1,hexa00/theia,epatpol/theia-1,lmcgupe/theia,epatpol/theia-1,lmcgupe/theiagreenkeeperTest,lmcgupe/theiagreenkeeperTest,lmcgupe/theiagreenkeeperTest