log.Fatalln calls os.Exit, which skips deferred functions and
leaves the console with the cursor disabled. Use ctx.Fatalln
instead, which uses a panic to exit and calls the deferred
function to restore the cursor.
Test: DIST_DIR=/tmp/\test\ foo m dist
Change-Id: Ie92297075e37c171d5ba48848a0ddb19652b051c
1f6faeb50f