[Cython] Bootstrapping broken in master

[Jeroen Demeyer]

Checking out Cython from master (the 0.23.x branch works fine) and 
running "python setup.py install" gives me

Unable to find pgen, not compiling formal grammar.
Compiling module Cython.Compiler.Scanning ...

ERROR: 'module' object has no attribute 'CCodeConfig'

Extension module compilation failed, looks like Cython cannot run
properly on this system.  To work around this, pass the option
"--no-cython-compile".  This will install a pure Python version of
Cython without compiling its own sources.

Traceback (most recent call last):
   File "setup.py", line 289, in <module>
     compile_cython_modules(cython_profile, cython_compile_more, 
cython_with_refnanny)
   File "setup.py", line 233, in compile_cython_modules
     result = compile(pyx_source_file)
   File 
"/usr/local/src/sage-git/local/src/cython/Cython/Compiler/Main.py", line 
677, in compile
     return compile_single(source, options, full_module_name)
   File 
"/usr/local/src/sage-git/local/src/cython/Cython/Compiler/Main.py", line 
630, in compile_single
     return run_pipeline(source, options, full_module_name)
   File 
"/usr/local/src/sage-git/local/src/cython/Cython/Compiler/Main.py", line 
487, in run_pipeline
     err, enddata = Pipeline.run_pipeline(pipeline, source)
   File 
"/usr/local/src/sage-git/local/src/cython/Cython/Compiler/Pipeline.py", 
line 334, in run_pipeline
     data = phase(data)
   File 
"/usr/local/src/sage-git/local/src/cython/Cython/Compiler/Pipeline.py", 
line 53, in generate_pyx_code_stage
     module_node.process_implementation(options, result)
   File 
"/usr/local/src/sage-git/local/src/cython/Cython/Compiler/ModuleNode.py", line 
118, in process_implementation
     self.generate_c_code(env, options, result)
   File 
"/usr/local/src/sage-git/local/src/cython/Cython/Compiler/ModuleNode.py", line 
317, in generate_c_code
     c_code_config = Code.CCodeConfig(
AttributeError: 'module' object has no attribute 'CCodeConfig'