www: fix mpi_sync_clocks links

public/index.html

@@ -108,7 +108,7 @@
 
       <h2>MPI Sync Clocks</h2>
       <p>
-	<a href="mpi_sync_clocks/doc/">MPI Sync Clocks</a> is an
+	<a href="pm2/mpi_sync_clocks/doc/">MPI Sync Clocks</a> is an
         implementation of synchronized clocks using MPI. It offers:
         <ul>
           <li><i>interpolated clocks</i> to get a consistent clock accross nodes
@@ -124,7 +124,7 @@
       <p>
 	<b>&nbsp;&raquo;&nbsp;</b>
 	More details are available on the
-	<a href="mpi_sync_clocks/doc/">MPI Sync Clocks documentation</a>.
+	<a href="pm2/mpi_sync_clocks/doc/">MPI Sync Clocks documentation</a>.
       </p>