Boot time slide: minor updates

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>

slides/boot-time-init-scripts/boot-time-init-scripts.tex

@@ -197,7 +197,7 @@ \section{Optimizing init scripts and system startup}
 	only the routines required by a particular set of executables.
 	Really useful with big libraries like OpenGL and QT. It even
 	works without having the source code.
-	\item Available in Yocto, but not in Buildroot (2019.02 status).
+	\item Available in Yocto, but not in Buildroot (2021.02 status).
         \item Limitation: \code{mklibs} could remove \code{dlopen}ed libraries
         (loaded "manually" by applications) because it doesn't see them.
 \end{itemize}

slides/boot-time-init-scripts3/boot-time-init-scripts3.tex

@@ -5,11 +5,12 @@
 \code{switch_root}:
 \begin{itemize}
 \item Use a light C library reduced to the minimum,
-      {\em uClibc} if you are not yet using it for your root filesystem
+      {\em uClibc} or {\em Musl} if you are not yet using it for
+      your root filesystem
 \item Reduce BusyBox to the strict minimum.
       You could even do without it and implement \code{/init} in C.
 \item Use statically linked applications (less CPU overhead, less
-      libraries to load, smaller initramfs if no libraries at all).
+      libraries to load, smaller initramfs if no libraries at all),
       \code{BR2_STATIC_LIBS} in Buildroot.
 \end{itemize}
 \end{frame}