Tcl/Tk multiarch should work for embedded interpreters

[Matthias Klose]

this is about further work for multiarching Tcl/Tk, continued from LP: #1122120

now, the library is moved into the multiarch location, but nothing else. I think this can be done better. The goal should be to have a runnable embedded Tcl interpreter inside the tcl8.5-lib packages. This includes the shared library files. Packages like vim should be installable for the foreign architecture with keeping tcl8.5 installed for the native architecture.

Colin:
> vim seems like a very tenuous use case, anyway. I can't think of a
> reason I'd want to install it from a foreign architecture.

vim was just used here as an example for an embedded interpreter. E.g. Installing the amd64 gdb on i386 with the embedded python interpreter to debug 64bit executables is a better use case. So please see vim just as an example.