obs/re6st: fix bootstrap script

Fixup b3ecd384i (obs/_generic: support bootstrapping with either python2 or python3)

The symbolic link is not suported by re6st compilation (it is totally
removed from the archive)
19 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.StandaloneDeploymentScriptTest-Debian.Bullseye

15:02:04

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

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passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.JEROME

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passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

06:16:12

passed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

00:31:57

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Bullseye

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passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

00:28:49

passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

01:15:34

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Bullseye

15:01:57

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

00:22:34

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:24:12

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

00:27:07

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

00:41:39

passed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

00:32:48

passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

00:29:17

passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

00:40:37

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

00:31:48

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

12:36:49

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

00:46:36