perf tools: Add trace/beauty/generated/ into .gitignore

No functionality changes.

Signed-off-by: Ravi Bangoria <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/.gitignore

···
 .config-detected
 util/intel-pt-decoder/inat-tables.c
 arch/*/include/generated/
+trace/beauty/generated/
 pmu-events/pmu-events.c
 pmu-events/jevents