dev-manual: move multiconfig documentation to its own document

In preparation of more section and examples to multiconfig, move the
section about it in building.rst into its own document.

Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
(From yocto-docs rev: 6f60fb09976540dd320816684684c14f6b7ab460)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/documentation/dev-manual/index.rst b/documentation/dev-manual/index.rst
index 760108f605..63736e0abf 100644
--- a/documentation/dev-manual/index.rst
+++ b/documentation/dev-manual/index.rst
@@ -20,6 +20,7 @@ Yocto Project Development Tasks Manual
    development-shell
    python-development-shell
    building
+   multiconfig
    speeding-up-build
    libraries
    prebuilt-libraries