software/slaprunner: Add symlink from srv/project to srv/runner/project

This is to match Theia file hierarchy

software/slaprunner/buildout.hash.cfg

@@ -18,7 +18,7 @@ md5sum = 8d6878ff1d2e75010c50a1a2b0c13b24
 
 [template-runner]
 filename = instance-runner.cfg
-md5sum = 6e279c46b07bf56b7b037a8ee2c6587e
+md5sum = 2582723c31166244ff25cb3d8c839ffa
 
 [template-runner-import-script]
 filename = template/runner-import.sh.jinja2

software/slaprunner/instance-runner.cfg

@@ -46,6 +46,7 @@ common-runner-parts =
   custom-frontend-promise
 {% endif %}
 {% endif %}
+  project-link
 ## Monitoring part
   monitor-base
   monitor-check-webrunner-internal-instance
@@ -159,6 +160,11 @@ software-test = $${:test}/software
 instance-test = $${:test}/instance
 sessions = $${buildout:directory}/.sessions
 
+[project-link]
+recipe = slapos.cookbook:symbolic.link
+target-directory = $${directory:srv}
+link-binary = $${runnerdirectory:project}
+
 [slaprunner]
 slaprunner = ${buildout:bin-directory}/slaprunner
 slapos = ${buildout:bin-directory}/slapos