[yocto] [PATCH] ref-manual: document strace dependency for Swabber

[Maxin B. John]

image-swab class depends on "strace" package to be present in the Build
Host. Document that dependency.

[YOCTO #8439]

Signed-off-by: Maxin B. John <maxin.john at intel.com>
---
 documentation/ref-manual/ref-classes.xml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index d87c9ff..fdee92a 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -1363,7 +1363,8 @@
         tool in order to detect and log accesses to the host system during
         the OpenEmbedded build process.
         <note>
-            This class is currently unmaintained.
+            We need to install strace package in the build host as a
+            dependency for this tool.This class is currently unmaintained.
         </note>
     </para>
 </section>
-- 
2.4.0