[tlbuild] rebuild tl if you want

[Simon]

On Wed, 2016-04-20 at 22:36 +0000, Karl Berry wrote:
> Wanted to say that there's a new release of dvisvgm which Akira has
> imported.  And assorted tweaks to luatex.  So feel free to rebuild if
> you like, although it's certainly not urgent.  There will surely be at
> least one more general rebuild before the end.  Thanks, K.

Rebuilt: mostly harmless.

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Simon