[PATCH v5 1/6] perf tools: Add 'perf-config' command

The perf configuration file contains many variables which can make the perf command's action more effective. But looking through state of configuration is difficult and there's no knowing what kind of other variables except variables in perfconfig.example exist. So This patch adds 'perf-config'

[PATCH v5 1/6] perf tools: Add 'perf-config' command

The perf configuration file contains many variables which can make the perf command's action more effective. But looking through state of configuration is difficult and there's no knowing what kind of other variables except variables in perfconfig.example exist. So This patch adds 'perf-config'