dev-manual, Makefile: Created new section on multi-config build deps

Rewrote the section on setting up and executing multi-config builds.
Broke the section into two sub-sections.  One is for the standard
information that was there for setting up a multi-config build. A
new section was for the cross-build dependencies in multi-config
builds.

Part of the re-write included creating a new figure that shows
the configuration file hierarchy needed for these types of builds.
So, new figure added to both the dev-manual and the mega-manual
figures directories.

Finally, the Makefile needed updated to account for the new figures.

(From yocto-docs rev: dc158e97c216aa6e7fa3755164409d581f8569c5)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 0 insertions, 0 deletions

diff --git a/documentation/mega-manual/figures/multiconfig_files.png b/documentation/mega-manual/figures/multiconfig_files.png
new file mode 100644
index 0000000000..0b59338b3a
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+++ b/documentation/mega-manual/figures/multiconfig_files.png