erp5: precompile eggs during software build

Uses https://pypi.org/project/plone.recipe.precompiler to create pyc
files in software, as the user installing software.
This solves the issue that no pyc where created when using slapos on
"bare metal", ie running zope as a different user than the one owning
the software (from unix file permission point of view)

stack/erp5/buildout.cfg

@@ -110,6 +110,7 @@ parts +=
 # Buildoutish
   eggs
   eggs-all-scripts
+  eggs-precompile
   testrunner
   test_suite_runner
 
@@ -602,6 +603,11 @@ eggs =
   munnel
 patch-binary = ${eggs:patch-binary}
 
+[eggs-precompile]
+recipe = plone.recipe.precompiler
+eggs = ${eggs:eggs}
+extra-paths = ${eggs:extra-paths}
+
 [zodbanalyze]
 recipe = zc.recipe.egg
 eggs = erp5.util
@@ -804,3 +810,5 @@ unidiff = 0.5.5
 # deepdiff = 3.3.0
 jsonpickle = 0.9.6
 decorator = 4.3.0
+
+plone.recipe.precompiler = 0.6
\ No newline at end of file