perf scripts python: Add support for input args in gecko script

Refines the argument handling mechanism in the "gecko-report" script to
enable better compatibility and improved user experience.

The script now differentiates between scenarios where arguments are
provided for record and report cases where gecko.py arguments are
passed.

Signed-off-by: Anup Sharma <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Ian Rogers <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Link: https://lore.kernel.org/r/ZNf7W+EIrrCSHZN0@yoga
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/scripts/python/bin/gecko-report

···
 #!/bin/bash
 # description: create firefox gecko profile json format from perf.data
-perf script "$@" -s "$PERF_EXEC_PATH"/scripts/python/gecko.py
+if [ "$*" = "-i -" ]; then
+perf script -s "$PERF_EXEC_PATH"/scripts/python/gecko.py
+else
+perf script -s "$PERF_EXEC_PATH"/scripts/python/gecko.py -- "$@"
+fi