needed by encfs

fixes #8660

also take maintainership

only julia was using it

the tests fails. move it to unmaintained til maintainer takes a look at it

backport a patch that fixes tests in 32 bits archs

due to:
luajit: bad light userdata pointer

related to https://github.com/LuaJIT/LuaJIT/issues/49

tests suite does git commits. if git is not ocnfigured it will error, so
we set the EMAIL environment.

some of the tests fails on aarch64. disable for now

suiteparse requires cmake to build

community/suitesparse: upgrade to to 5.2.0

float-to-8bit test is unstable on s390x, it won't fail if previous build
is cached as being successful.

babl commit 90e25d7ff381fc67588d77bb033992079bab5d3a introduces -Ofast
which (probably) causes this.

upstream bug : https://bugzilla.gnome.org/show_bug.cgi?id=790745