First draft of this new section. It included a figure so the
figure had to be added to the "figures" folder of the
mega-manual.
New section introduces concepts behind the types of cross-toolchains
YP develops through user commands that build images and build the
relocatable SDK.
(From yocto-docs rev: b3c9a2e3f90892a2175110393a962fd152316ca6)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>