stack/erp5 Add ocropy in erp5 stack

This commit contain modifications that allow ocropy and scipy to be
installed as eggs. Extra ld_path are added to python to allow the former
to run scipy (that needs libstdc++) inside testnodes.

stack/erp5/buildout.cfg

@@ -9,6 +9,7 @@ extends =
   ../../component/dbus/buildout.cfg
   ../../component/file/buildout.cfg
   ../../component/fonts/buildout.cfg
+  ../../component/gcc/buildout.cfg
   ../../component/ghostscript/buildout.cfg
   ../../component/git/buildout.cfg
   ../../component/graphviz/buildout.cfg
@@ -27,6 +28,7 @@ extends =
   ../../component/matplotlib/buildout.cfg
   ../../component/mesa/buildout.cfg
   ../../component/numpy/buildout.cfg
+  ../../component/ocropy/buildout.cfg
   ../../component/onlyoffice-x2t/buildout.cfg
   ../../component/pandas/buildout.cfg
   ../../component/percona-toolkit/buildout.cfg
@@ -90,6 +92,8 @@ parts +=
   libreoffice-bin
   w3-validator
   tesseract
+  scipy
+  ocropy
   hookbox
   percona-toolkit
   zabbix-agent
@@ -136,6 +140,10 @@ parts +=
   ipython-notebook
   instance-jupyter
 
+# override python2.7 to add SlapOS libstdc++ in RPATH.
+[python2.7]
+extra-ldflags = -Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64
+
 # override instance-jupyter not to render into default template.cfg
 [instance-jupyter]
 rendered = ${buildout:directory}/template-jupyter.cfg
@@ -437,11 +445,13 @@ eggs = ${neoppod:eggs}
   ${numpy:egg}
   ${matplotlib:egg}
   ${lxml-python:egg}
+  ${ocropy:egg}
   ${pandas:egg}
   ${pillow-python:egg}
   ${python-ldap-python:egg}
   ${pysvn-python:egg}
   ${pycrypto-python:egg}
+  ${scipy:egg}
   ${scikit-learn:egg}
   lock_file
   astor