trace-cmd: Move trace-usage to lib objects

Make the usage function available to shared objects, such as the python
ctracecmd.so module built by the SWIG mechanism.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
LKML-Reference: <1294173820-7043-3-git-send-email-dvhart@linux.intel.com>
CC: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
1 file changed