component/pygolang: use experimental y/bstr+x/gpystr branch.

component/pygolang/buildout-dev.cfg

@@ -12,8 +12,8 @@ setup   = ${pygolang-repository:location}
 
 [pygolang-repository]
 recipe  = slapos.recipe.build:gitclone
-repository = https://lab.nexedi.com/nexedi/pygolang.git
-branch  = master
+repository = https://lab.nexedi.com/kirr/pygolang.git
+branch  = y/bstr+x/gpystr
 location = ${buildout:parts-directory}/pygolang-dev
 git-executable = ${git:location}/bin/git