perf python: Remove debug.h

We only need to have the prototype for the eprintf() replacement we use
in the python binding, provide it and avoid dragging debug.h as a
dependency.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-s0gy4ur3drmhsknsddwjco59@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>