modules/lcr: added in docs missing install dependency on libpcre

- Credits to Kris Amy.
(cherry picked from commit 0c7048297f590f140ae84efdcde8a392ef23527e)

modules/lcr/README

@@ -247,7 +247,7 @@ Chapter 1. Admin Guide
 
    The following libraries or applications must be installed before
    running SIP Router with this module:
-     * none.
+     * libpcre
 
 3. Exported Parameters
 

modules/lcr/doc/lcr_admin.xml

@@ -103,7 +103,7 @@
 			<itemizedlist>
 			<listitem>
 			<para>
-				<emphasis>none</emphasis>.
+				<emphasis>libpcre</emphasis>
 			</para>
 			</listitem>
 			</itemizedlist>