If we have the task number here we need to subtract 1 to get the number
of tasks completed.
(Bitbake rev: 7c78a1cd3f0638ae76f7c7a469b7f667c7c58090)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>