ref-manual: update buildpaths QA check documentation

The buildpaths QA check is now practically usable and enabled by
default, so update the comment and add a section with the warning
message since users may start seeing it in their builds.

(From yocto-docs rev: a14997e3b8576cd1a6e1c38d13b5b8e05ac03b88)

Signed-off-by: Paul Eggleton <paul.eggleton@microsoft.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index 6c60d414ca..d94db03616 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -1008,8 +1008,8 @@ Here are the tests you can list with the :term:`WARN_QA` and
    software, like bootloaders, might need to bypass this check.
 
 -  ``buildpaths:`` Checks for paths to locations on the build host
-   inside the output files. Currently, this test triggers too many false
-   positives and thus is not normally enabled.
+   inside the output files. Not only can these leak information about
+   the build environment, they also hinder binary reproducibility.
 
 -  ``build-deps:`` Determines if a build-time dependency that is
    specified through :term:`DEPENDS`, explicit