Patch 1 in this series introduced a pseudo-regression. If the symbol 
table contained:

foo<int>(int)
foo<char>(char)
Bar<int>
Bar<char>

and the user did:

(gdb) print foo
or
(gdb) ptype Bar

they would get the results for an arbitrary match of foo and Bar where 
previously the would just get a "symbol not found" error just because 
template lookup did not work properly.

This patch corrects that by introducing a meta variable representing the 
template into the scope of the template instance. This symbol is a place 
holder until overload resolution, but if the user tries to evaluate it 
or print its type they receive an appropriate error message:

"Symbol represents a template and cannot be evaluated."
"type = Template Symbol"

respectively.