Added documentation for --suppress-xml (#1420)

* Added documentation for --suppress-xml

* Bad copy place job "--suppress-xml" not "--suppressions-list"

* Fixed indentation to use . instead of tab

Author: Laro88

man/cppcheck.1.xml

@@ -135,6 +135,7 @@ man(1), man(7), http://www.tldp.org/HOWTO/Man-Page/
       <arg choice="opt"><option>--std=&lt;id&gt;</option></arg>
       <arg choice="opt"><option>--suppress=&lt;spec&gt;</option></arg>
       <arg choice="opt"><option>--suppressions-list=&lt;file&gt;</option></arg>
+	  <arg choice="opt"><option>--suppress-xml=&lt;.xml file&gt;</option></arg>
       <arg choice="opt"><option>--template='&lt;text&gt;'</option></arg>
       <arg choice="opt"><option>--verbose</option></arg>
       <arg choice="opt"><option>--version</option></arg>
@@ -516,6 +517,12 @@ There are false positives with this option. Each result must be carefully invest
           Each suppression is in the format of &lt;spec&gt; above.</para>
         </listitem>
       </varlistentry>
+      <varlistentry>
+        <term><option>--suppress-xml=&lt;.xml file&gt;</option></term>
+        <listitem>
+          <para>Use suppressions defined in xml as described in the manual</para>
+        </listitem>
+      </varlistentry>
       <varlistentry>
         <term><option>--template='&lt;text&gt;'</option></term>
         <listitem>