Update INSTALL_UBUNTU.md

2 jobs for master
Status Job ID Name Coverage
  Test
failed #743
job1

00:00:41

failed #125
job1

 
Name Stage Failure
failed
job1 Test
or you are unsure what this means choose another name with the '--name' option.

$ ./install.sh all

Install all current projects
============================

cat: .gitmodules: No such file or directory
ERROR: Job failed: exit code 1