Add new TCL Primer under the main Technical Primer page.

git-svn-id: svn://svn.berlios.de/openocd/trunk@1856 b42882b7-edfa-0310-969c-e2dbd0fdcd60

doc/manual/main.txt

@@ -18,6 +18,7 @@ This pages lists Technical Primers available for OpenOCD Developers.
 They seek to provide information to pull novices up the learning curves
 associated with the fundamental technologies used by OpenOCD.
 
+- @subpage primertcl
 - @subpage primerjtag
 
 Contributions or suggestions for new Technical Primers are welcome.