8263546: Add "findsym" command to clhsdb.html help file

Reviewed-by: ysuenaga, lmesnik

Author: plummercj

src/jdk.hotspot.agent/doc/clhsdb.html

@@ -53,7 +53,8 @@ <h3>Annotated output of CLHSDB help command</h3>
   echo [ true | false ] <font color="red">turn on/off command echo mode</font>
   examine [ address/count ] | [ address,address] <font color="red">show contents of memory from given address</font>
   field [ type [ name fieldtype isStatic offset address ] ] <font color="red">print info about a field of HotSpot type</font>
-  findpc address <font color="red">print info. about pointer location</font>
+  findpc address <font color="red">print info about pointer location</font>
+  findsym name <font color="red">print address of symbol in the executable or shared library</font>
   flags [ flag ] <font color="red">show all -XX flag name value pairs. or just show given flag</font>
   help [ command ] <font color="red">print help message for all commands or just given command</font>
   history <font color="red">show command history. usual !command-number syntax works.</font>