allegro5 5.0.10

Closes #440.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
allegro5: fix build when pandoc is installed
ppl011: disable demo programs

This fixes the build in the presence of glpk from homebrew-science

Fixes #326.
ppl10: disable demo programs

This fixes the build in the presence of glpk from homebrew-science
jenkins-lts 1.565.2