Add documentation on fragments

- terms.rst: Provide the definitions of a Configuration Fragment and a
  Built-in Fragment.
- ref-manual: Add a quick reference guide on bitbake-config-build, and
  list the available fragments in OE-Core.
  Document the underlying variables related to fragments in the
  glossary.
- dev-manual: give instructions on how to create new custom fragments.

(From yocto-docs rev: 0820b71c830cab4151b0219b6d4013c41f461c6e)

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 ea528855a8..7a581236a9 100644
--- a/documentation/dev-manual/index.rst
+++ b/documentation/dev-manual/index.rst
@@ -16,6 +16,7 @@ Yocto Project Development Tasks Manual
    new-machine
    upgrading-recipes
    temporary-source-code
+   creating-fragments
    quilt.rst
    development-shell
    python-development-shell