Check sail-arm and sail-riscv in CI, use matrix instead of separate files

[Trolldemorted]

Fixes #103

[Alasdair]

I think the line:

        run: git clone https://github.com/rems-project/sail-riscv.git && eval $(opam env) && make

is missing a cd into the sail-riscv directory - I'm not sure it'll work without HOL4 and Isabelle. We had an internal Jenkins server that did this kind of matrix style CI between everything but it's become a bit awkward to use as we are now working from home and it's not public.

[Trolldemorted]

I think the line:
run: git clone https://github.com/rems-project/sail-riscv.git && eval $(opam env) && make
is missing a cd into the sail-riscv directory

You are totally right, I have amended my commit

I'm not sure it'll work without HOL4 and Isabelle.

The build fails indeed, but I can't tell whether that's because of missing/broken installations of HOL4/Isabelle or something different. The build fails with this message:

sed -i 's/datatype ast/datatype (plugins only: size) ast/' generated_definitions/isabelle/RV64/Riscv_types.thy
sed: 1: "generated_definitions/i ...": extra characters at the end of g command
make: *** [generated_definitions/isabelle/RV64/Riscv.thy] Error 1
make: *** Deleting file `generated_definitions/isabelle/RV64/Riscv.thy'

Can this be related to HOL4 or Isabelle? Are you able to build the riscv models in your enviroment with the current sail2 branch?