pttc: restrict the trace filename to FILENAME_MAX bytes.
pttc: restrict the trace filename to FILENAME_MAX bytes.

Change-Id: I03d92e43e8c1dabdc873f8e048fe05dc83b8e20f
Signed-off-by: Markus Metzger <5f675b2b36595f90898e014b548ff7d9bbff2ab7@intel.com>

01org/processor-trace,01org/processor-trace,01org/processor-trace