TEST: add a progam to compare the speed of vsnprintf and qb_vsnprintf_serialize
On my system I get:
qb store] Duration: 8.289 OPs/sec: 1206381.250
snprintf] Duration: 16.712 OPs/sec: 598368.000
Signed-off-by: Angus Salkeld <asalkeld@redhat.com>