BQLmon: ignore perf.data* files
BQLmon: ignore perf.data* files

Running "perf" in the same directory is not uncommon, so let's just
ignore these files.

Signed-off-by: Florian Fainelli <59190c1867e3222b932a0de3c668eb2d980d69a2@gmail.com>

dtaht/bqlmon,ffainelli/bqlmon