Fixes [YOCTO #2528]
The defaults for BB_NUMBER_THREADS and PARALLEL_MAKE are now
automatically set to the build host's number of processor cores.
I updated the "Building and Image" section in the Quick Start
to state that. I also updated the PARALLEL_MAKE variable.
(From yocto-docs rev: 2069c96d2410605c089da4eede2c7b4f9a7b704a)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>