Log Message:
x11/tk: Ensure tkConfig.sh has embedded rpath

The version of the new tk package had some problems.
 - The x11 paths weren't coming through
 - The tkConfig.sh utility was missing runpath definition for TK_LIB_SPEC
 - Threading was automatically selected

The X11 problem was fixed with addition CONFIGURE_ARGS
The runpath for TK_LIB_SPEC was added in the configure patch
An options.mk file was added based on the tcl version.

Problems found and fixes suggested by he@