Log Message:
di: update to 4.46.

From MAINTAINER Brad Lanm in PR 53187.

Changes:

    4.46                                    [2018-4-11]
        Tcl: Fix bad allocation.
        Tcl: Raise errors rather than exiting.
        Exit program when incorrect options are specified.
        Update mkconfig to version 1.31.
        Add missing mkconfig/runtests.sh.

    4.45                                    [2018-4-10]
        Update mkconfig to version 1.30 to fix modern libintl.h/printf tests.