[e-acsl] enable dune tests

src/plugins/e-acsl/.gitignore

src/plugins/e-acsl/tests/builtin/dune

src/plugins/e-acsl/tests/builtin/strcat.c

src/plugins/e-acsl/tests/builtin/strcmp.c

src/plugins/e-acsl/tests/builtin/strcpy.c

src/plugins/e-acsl/tests/builtin/strlen.c

src/plugins/e-acsl/tests/dune

src/plugins/e-acsl/tests/format/dune

src/plugins/e-acsl/tests/format/fprintf.c

src/plugins/e-acsl/tests/format/printf.c

src/plugins/e-acsl/tests/ptests_config

src/plugins/e-acsl/tests/test_config

src/plugins/e-acsl/tests/test_config_dev