Add CI

[skr4n]

Upstream is yet to add vendoring support for libcdio-sys.
This therefore fetches it from a fork.

Do not merge.

[rocky]

For what it is worth, I tried this branch on MSYS2 and FreeBSD, and the compile problems I was having are now gone.

For MSYS2 cargo build there is some weirdness about how MSYS2's git package works. Apparently this is a common problem and you have to do something to work around SSL2 verification.

Running gave me a UDF test failure:

$ cargo test -- --include-ignored
...
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

     Running tests\iso-info.rs (target\debug\deps\iso_info-83a2970b562b84ca.exe)

running 7 tests
test joliet_metadata ... ok
test rock_metadata ... ok
test xa_metadata ... ok
test rock_contents ... ok
test joliet_contents ... ok
test udf ... FAILED
test xa_contents ... ok

failures:

---- udf stdout ----

thread 'udf' (7484) panicked at libcdio-cli\tests\iso-info.rs:157:10:
Unexpected stdout, failed diff original var
├── original: /:
│     dr-xr-xr-x 4294967295 4294967295   1       100 Feb 20 2014 01:26:20 .
│     -r-xr-xr-x 4294967295 4294967295   1        10 Feb 20 2014 01:25:12 FéжΘvrier
│
├── diff:
│   ---         orig
│   +++         var
│   @@ -2,2 +2,2 @@
│   -  dr-xr-xr-x 4294967295 4294967295   1       100 Feb 20 2014 01:26:20 .
│   -  -r-xr-xr-x 4294967295 4294967295   1        10 Feb 20 2014 01:25:12 FéжΘvrier
│   +  dr-xr-xr-x 4294967295 4294967295   1       100 Feb 19 2014 21:26:20 .
│   +  -r-xr-xr-x 4294967295 4294967295   1        10 Feb 19 2014 21:25:12 FéжΘvrier
└── var as str: /:
      dr-xr-xr-x 4294967295 4294967295   1       100 Feb 19 2014 21:26:20 .
      -r-xr-xr-x 4294967295 4294967295   1        10 Feb 19 2014 21:25:12 FéжΘvrier


command=`"C:\\msys64\\tmp`\libcdio\\cdio-rust\\target\\debug\\iso-info-rs.exe" "-U" "../test-data/udf.iso"`
code=0
stdout=```
/:
  dr-xr-xr-x 4294967295 4294967295   1       100 Feb 19 2014 21:26:20 .
  -r-xr-xr-x 4294967295 4294967295   1        10 Feb 19 2014 21:25:12 FéжΘvrier

stderr=""

note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    udf

test result: FAILED. 6 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s

error: test failed, to rerun pass `-p libcdio-cli --test iso-info`