wiki: device_build_before_init: Add xxd to deps

Change-Id: I2105061dbb6b59d39770dc4b09a5fc2db05c8fb6

Author: DaemonMCR

_includes/templates/device_build_before_init.md

@@ -67,7 +67,7 @@ command directly in the Terminal." %}
 
 To build LineageOS, you'll need:
 
-* `bc bison build-essential ccache curl flex g++-multilib gcc-multilib git git-lfs gnupg gperf imagemagick protobuf-compiler python3-protobuf lib32readline-dev lib32z1-dev libdw-dev libelf-dev libgnutls28-dev lz4 libsdl1.2-dev libssl-dev libxml2 libxml2-utils lzop pngcrush rsync schedtool squashfs-tools xsltproc {% if cpu_architecture contains 'x86' %}yasm {% endif %}zip zlib1g-dev`
+* `bc bison build-essential ccache curl flex g++-multilib gcc-multilib git git-lfs gnupg gperf imagemagick protobuf-compiler python3-protobuf lib32readline-dev lib32z1-dev libdw-dev libelf-dev libgnutls28-dev lz4 libsdl1.2-dev libssl-dev libxml2 libxml2-utils lzop pngcrush rsync schedtool squashfs-tools xsltproc xxd {% if cpu_architecture contains 'x86' %}yasm {% endif %}zip zlib1g-dev`
 
 {% if device.versions contains 13.0 %}
 To build LineageOS 13.0, you'll also need: