manuals: use references to the "Build Directory" term

Replace instances of "Build Directory" and "build directory"
(when applicable) by :term:`Build Directory` as already
done in most places.

Doing this, fix the indentation of the paragraphs with
this term.

(From yocto-docs rev: dce50679242d39f133e0cde5c8483b5e69f3eb54)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/migration-guides/migration-1.5.rst

@@ -126,10 +126,9 @@ The following directory changes exist:
    :term:`DEPLOY_DIR_IMAGE` variable in the external environment.
 
 -  When buildhistory is enabled, its output is now written under the
-   :term:`Build Directory` rather than
-   :term:`TMPDIR`. Doing so makes it easier to delete
-   :term:`TMPDIR` and preserve the build history. Additionally, data for
-   produced SDKs is now split by :term:`IMAGE_NAME`.
+   :term:`Build Directory` rather than :term:`TMPDIR`. Doing so makes
+   it easier to delete :term:`TMPDIR` and preserve the build history.
+   Additionally, data for produced SDKs is now split by :term:`IMAGE_NAME`.
 
 -  The ``pkgdata`` directory produced as part of the packaging process
    has been collapsed into a single machine-specific directory. This

documentation/migration-guides/migration-1.6.rst

@@ -233,9 +233,9 @@ Separate build and source directories have been enabled by default for
 selected recipes where it is known to work and for all
 recipes that inherit the :ref:`cmake <ref-classes-cmake>` class. In
 future releases the :ref:`autotools <ref-classes-autotools>` class
-will enable a separate build directory by default as well. Recipes
+will enable a separate :term:`Build Directory` by default as well. Recipes
 building Autotools-based software that fails to build with a separate
-build directory should be changed to inherit from the
+:term:`Build Directory` should be changed to inherit from the
 :ref:`autotools-brokensep <ref-classes-autotools>` class instead of
 the ``autotools`` or ``autotools_stage``\ classes.
 

documentation/migration-guides/migration-1.7.rst

@@ -42,7 +42,7 @@ Autotools Class Changes
 The following :ref:`autotools <ref-classes-autotools>` class changes
 occurred:
 
--  *A separate build directory is now used by default:* The
+-  *A separate :term:`Build Directory` is now used by default:* The
    :ref:`autotools <ref-classes-autotools>` class has been
    changed to use a directory for building
    (:term:`B`), which is separate from the source directory

documentation/migration-guides/migration-2.6.rst

@@ -343,8 +343,7 @@ BitBake Changes
 ---------------
 
 The server logfile ``bitbake-cookerdaemon.log`` is now always placed in
-the :term:`Build Directory` instead of the current
-directory.
+the :term:`Build Directory` instead of the current directory.
 
 .. _migration-2.6-security-changes:
 

documentation/migration-guides/migration-general.rst

@@ -86,7 +86,7 @@ any new Yocto Project release.
    3. Capture the buildhistory output (as specified by :term:`BUILDHISTORY_DIR`)
       and ensure it is preserved for subsequent builds. How you would do this
       depends on how you are running your builds - if you are doing this all on
-      one workstation in the same build directory you may not need to do
+      one workstation in the same :term:`Build Directory` you may not need to do
       anything other than not deleting the buildhistory output directory. For
       builds in a pipeline it may be more complicated.