edit .gitlabci file

1 job for gitlab in 58 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #2953194
jobs

00:00:58

 
Name Stage Failure
failed
jobs Test There is an unknown failure, please try again
 93750K .......... .......... .......... .......... .......... 99%  253M 0s
93800K .......... .......... .... 100% 233M=2.8s

2016-08-09 15:15:15 (32.4 MB/s) - ‘arduino-1.6.9-linux64.tar.xz’ saved [96075820/96075820]

$ unxz arduino-1.6.9-linux64.tar.xz
/bin/bash: line 46: unxz: command not found

ERROR: Build failed: exit code 1