slapos-sr-testing: Install pycurl with component

Tests depend on pycurl, which has to be provided with component, as
otherwise is uninstallable.

software/slapos-sr-testing/software.cfg

@@ -5,6 +5,7 @@ extends =
   ../../component/curl/buildout.cfg
   ../../component/openssl/buildout.cfg
   ../../component/git/buildout.cfg
+  ../../component/pycurl/buildout.cfg
   ../../component/faketime/buildout.cfg
   ../../component/pillow/buildout.cfg
   ../../component/python-cryptography/buildout.cfg
@@ -209,6 +210,7 @@ extra-eggs =
   ${lxml-python:egg}
   ${slapos.core-setup:egg}
   ${pillow-python:egg}
+  ${pycurl:egg}
   erp5.util
   ${python-pynacl:egg}
   ${python-cryptography:egg}