ref-manual: Added TEST_TARGET_IP to the variable glossary.

Fixes [YOCTO #5554]

New variable description.

(From yocto-docs rev: 8c673542769a1a1aaef58100be15fc735a19adbe)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/ref-variables.xml

@@ -7549,6 +7549,32 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-TEST_TARGET_IP'><glossterm>TEST_TARGET_IP</glossterm>
+            <glossdef>
+                <para>
+                    The IP address of your hardware under test.
+                    The <filename>TEST_TARGET_IP</filename> variable has no
+                    effect when
+                    <link linkend='var-TEST_TARGET'><filename>TEST_TARGET</filename></link>
+                    is set to "qemu".
+                </para>
+
+                <para>
+                    When you specify the IP address, you can also include a
+                    port.
+                    Here is an example:
+                    <literallayout class='monospaced'>
+     TEST_TARGET_IP = "192.168.1.4:2201"
+                    </literallayout>
+                    Specifying a port is useful when SSH is started on a
+                    non-standard port or in cases when your hardware under test
+                    is behind a firewall or network that is not directly
+                    accessible from your host and you need to do port address
+                    translation.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-TEST_SUITES'><glossterm>TEST_SUITES</glossterm>
             <glossdef>
                 <para>