[PATCH buildfix v2] tests: fix test-uncommit.t to not rely on GNU rm's flags behavior

[Martin von Zweigbergk]

On Fri, Sep 15, 2017 at 12:16 PM, Augie Fackler <raf at durin42.com> wrote:
>
> # HG changeset patch
> # User Augie Fackler <augie at google.com>
> # Date 1505502693 14400
> #      Fri Sep 15 15:11:33 2017 -0400
> # Node ID 933ca2b610855d7479a2514e81b5eb9ad1c13cb4
> # Parent  99a25fd51eee06baf00117114f84b630dd75f15e
> tests: fix test-uncommit.t to not rely on GNU rm's flags behavior

Queued, thanks!