[PATCH v5 2/6] perf config: Add '--system' and '--user' options to select which config file is used

Which config file is used is decided in only perf_config(). And a perf-confg command depend on perf_config() getting config file path. So add '--system' and '--user' options to select which config file to be used without perf_config(). If file-options isn't used, default config file path is

[PATCH v5 2/6] perf config: Add '--system' and '--user' options to select which config file is used

Which config file is used is decided in only perf_config(). And a perf-confg command depend on perf_config() getting config file path. So add '--system' and '--user' options to select which config file to be used without perf_config(). If file-options isn't used, default config file path is