branch tk-update created (now b540874)

[Ludovic Courtès]

civodul pushed a change to branch tk-update
in repository guix.

        at  b540874   gnu: python: Move tkinter to "tk" output.

This branch includes the following new commits:

       new  90d7425   tk: Hardcode path to TK_LIBRARY.
       new  546b2e3   gnu: tcl: Produce 'tclIndex' files deterministically.
       new  819942d   gnu: python-2: Honor 'SOURCE_DATE_EPOCH'.
       new  c663ca8   gnu: python: Set SOURCE_DATE_EPOCH to 1 instead of 0.
       new  842f61d   gnu: python: Make 'sys.version' deterministic.
       new  b658b8d   gnu: python: Factorize configure flags with minimal 
variants.
       new  9ed66f6   gnu: python: Do not record configure flags.
       new  081ae8d   gnu: python: Clarify and shorten the list of built-time 
modules.
       new  b540874   gnu: python: Move tkinter to "tk" output.

The 9 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.