sysdev: labs: clarify lists in the Buildroot config are space separated

This is not clear due to the formatting of long strings which unavoidably
wrap.

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

Author: lucaceresoli

labs/sysdev-system-integration/sysdev-system-integration.tex

@@ -86,7 +86,10 @@ \section{Buildroot configuration}
   \item Set \code{Kernel version} to your kernel version. You can use \code{make kernelversion} to
   get it from the Linux kernel source tree.
   \fi
-  \item Set \code{Custom kernel patches} to \code{board/bootlin/training/0001-Custom-DTS-for-Bootlin-lab.patch} \code{board/bootlin/training/0002-Revert-perf-tools-Create-source-symlink-in-perf-obje.patch}
+  \item Set \code{Custom kernel patches} to
+        \code{board/bootlin/training/0001-Custom-DTS-for-Bootlin-lab.patch}
+        \code{board/bootlin/training/0002-Revert-perf-tools-Create-source-symlink-in-perf-obje.patch}
+        (separated by a whitespace)
   \item Set \code{Kernel configuration} to \code{Using a custom (def)config file})
   \item Set \code{Configuration file path} to \code{board/bootlin/training/linux.config}
   \item Select \code{Build a Device Tree Blob (DTB)}