Embedded Linux: no more need to disable "xmlto" building alsa-utils

Tested successfully without this option

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

labs/sysdev-thirdparty/sysdev-thirdparty.tex

@@ -437,15 +437,14 @@ \section{Alsa-utils}
 Hence, we can just disable the build of {\em alsamixer}.
 
 Of course, if we wanted it, we would have had to build {\em ncurses} first,
-just like we built {\em alsa-lib}. We will also need to disable support
-for {\em xmlto} that generates the documentation.
+just like we built {\em alsa-lib}.
 
 \begin{bashinput}
 $ LDFLAGS=-L$HOME/__SESSION_NAME__-labs/thirdparty/staging/usr/lib \
      CPPFLAGS=-I$HOME/__SESSION_NAME__-labs/thirdparty/staging/usr/include \
      CC=arm-linux-gcc \
      ./configure --host=arm-linux --prefix=/usr \
-     --disable-alsamixer --disable-xmlto
+     --disable-alsamixer
 \end{bashinput}
 
 Then, run the compilation with \code{make}. Hopefully, it works!