Renamed to "Speeding Up a Build" and moved out of the setting up
chapter to the common tasks chapter. Fixed a couple links in the
ref-manual.
(From yocto-docs rev: c53fddd353230c8ef1abc21c7a2d2b1f492f034a)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>