[PATCH V2 25/30] perf tools: adding perf_session to *info_prive_size()

On some architecture the size of the private header may be dependent on the number of tracers used in the session. As such adding a "struct perf_session" parameter, which should contain all the required information. Also adjusting the existing client of the interface to take the new parameter

[PATCH V2 25/30] perf tools: adding perf_session to *info_prive_size()

On some architecture the size of the private header may be dependent on the number of tracers used in the session. As such adding a "struct perf_session" parameter, which should contain all the required information. Also adjusting the existing client of the interface to take the new parameter