yocto: slides: mention site.conf

Reported-by: [email protected]
Signed-off-by: Luca Ceresoli <[email protected]>

slides/yocto-basics/yocto-basics.tex

@@ -99,14 +99,20 @@ \subsection{Configuring the build system}
 \begin{frame}
   \frametitle{The \code{build/conf/} directory}
   \begin{itemize}
-    \item The \code{conf/} directory in the \code{build} one holds
-      build specific configuration.
+    \item The \code{conf/} directory in the \code{build} one holds two
+      mandatory build-specific configuration files:
     \begin{description}
       \item[bblayers.conf] Explicitly list the layers to use.
       \item[local.conf] Set up the configuration variables relative to
         the current user for the build. Configuration variables can be
         overridden there.
     \end{description}
+    \item Additional optional configuration files can be used:
+    \begin{description}
+      \item[site.conf] Similar to \code{local.conf} but intended to be used
+        for site-specific settings, such as network mirrors and CPU/memory
+        resource usage limits.
+    \end{description}
   \end{itemize}
 \end{frame}