Bug#1064648: allegro5-doc: please make the build reproducible.

[Andreas Rönnquist]

Control: reopen 1064648

Those fixes was obviously not enough, just see the repro reports.

The strange thing is that it according to the tests does seem to build
reproducible on arm64... 

One other detail is that on armhf the only change seems to be the
architecture which is included in the ALLEGRO_PKG_HOST_SYSTEM variable.

Is there some magic like SOURCE_DATE_EPOCH to use that would avoid this
problem in this case?

best
/Andreas
gusnan at debian.org