docs: add reqs for void linux

docs/index.html

@@ -544,6 +544,7 @@ USE_OSGPLUGIN(<plugin2>)
         <li><a href="#requirements-gentoo">Gentoo</a></li>
         <li><a href="#requirements-macos">Mac OS X</a></li>
         <li><a href="#requirements-opensuse">openSUSE</a></li>
+        <li><a href="#requirements-void">Void</a></li>
         <li><a href="#requirements-wsl">Windows Subsystem for Linux</a></li>
     </ul>
 
@@ -1047,6 +1048,32 @@ USE_OSGPLUGIN(&lt;plugin2&gt;)
     <a href="#issue-32-bit-systems">32-bit systems</a>.
     </p>
 
+    <h3 id="requirements-void">Void</h3>
+
+    <!-- https://voidlinux.org/packages -->
+    <pre>xbps-install -S \
+    autoconf \
+    automake \
+    flex \
+    gcc \
+    gdk-pixbuf-devel \
+    gettext \
+    gettext-devel \
+    git \
+    gperf \
+    intltool \
+    libcurl-devel \
+    libtool \
+    make \
+    p7zip \
+    patch \
+    perl-XML-Parser \
+    python \
+    ruby \
+    unzip \
+    wget \
+    xz</pre>
+
     <h3 id="requirements-wsl">Windows Subsystem for Linux</h3>
 
     <p>