x11-toolkits/py-kivy: mark BROKEN after r470010

Error compiling Cython file:

...

            end = time()
            Logger.debug("Svg: Loaded {} in {:.2f}s".format(filename, end - start))
        finally:
            fd.close()

cdef void reload(self) except *:
    ^

kivy/graphics/svg.pyx:469:9: Signature not compatible with previous declaration

Error compiling Cython file:

...

    cpdef flag_update(self, int do_parent=?, list _instrs=?)
ELSE:
    cpdef flag_update(self, int do_parent=?)
cdef void flag_update_done(self)
cdef void set_parent(self, Instruction parent)
cdef void reload(self)
               ^

kivy/graphics/instructions.pxd:36:20: Previous declaration is here
building 'kivy.graphics.svg' extension
cc -DNDEBUG -O2 -pipe -fstack-protector -fno-strict-aliasing -fPIC -Ikivy/include -I/usr/local/include -Ikivy/include -I/usr/local/include/python2.7 -c kivy/graphics/svg.c -o build/temp.freebsd-11.1-RELEASE-p9-i386-2.7/kivy/graphics/svg.o
kivy/graphics/svg.c:1:2: error: Do not use this file, it is the result of a failed Cython compilation.
#error Do not use this file, it is the result of a failed Cython compilation.

^

PR: 228235