bug#27593: [PATCH v3] gnu: groff: Remove timestamps.

[Danny Milosavljevic]

Thanks!

Pushed to core-updates as 9146543f8dce997c194aea93bf4c7a7a4144c8c9.  Note that 
for real reproducibility the ghostscript patches are required too, and a phase 
in groff that sets the environment variable.

I've sent a new series for ghostscript.