perf tools: Add the bash completion for listing subsubcommands of perf script
The bash completion does not support listing subsubcommands for 'perf script <TAB>', so fix it. Example: Before this patch: $ perf script <TAB> $ As shown above, the subsubcommands of perf script does not come out. After this patch: $ perf script <TAB> record report As shown above, the subsubcommands of perf script can come out now. Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1426685758-25488-10-git-send-email-yunlong.song@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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