Compute karma binary path after updating modules
Compute karma binary path after updating modules

This fixes a problem where tests fail to run after wiping out
node_modules.

Change-Id: Iec3622ef01023ed5db0f8951834d18273d848a46

TheModMaker/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,vimond/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,vimond/shaka-player,tvoli/shaka-player,tvoli/shaka-player,vimond/shaka-player