Recommended update for tcl

This update for tcl fixes the following issue:

- `TCL_LIBS` in `tclConfig.sh` possibly breaks build on newer service packs. (bsc#1179615)

It is not needed for linking to a dynamic `libtcl` anyway and now it is empty.

This update was imported from the SUSE:SLE-15:Update update project.

Fixed bugs
bnc#1179615
can not rebuild postgresql as tcl has libieee in the config which has been removed
Selected Binaries
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