add haiku support

[hoanga]

hello 👋

the following pr adds build support for haiku. a sample test run on a haiku host is shown below:

> uname -a
Haiku shredder 1 hrev55891 Feb 19 2022 08:17:46 x86_64 x86_64 Haiku

> cargo test
   Compiling libc v0.2.119
   Compiling os_pipe v1.0.0 (/boot/home/src/git/rust-libs/os_pipe.rs)
    Finished test [unoptimized + debuginfo] target(s) in 7.12s
     Running unittests (target/debug/deps/os_pipe-d86de2364d87edcc)

running 9 tests
test tests::test_parent_handles_dont_close ... ok
test tests::test_debug ... ok
test tests::test_pipe_no_data ... ok
test tests::test_pipe_some_data_with_refs ... ok
test tests::test_pipe_some_data ... ok
test tests::test_try_clone ... ok
test tests::test_pipe_a_megabyte_of_data_from_another_thread ... ok
test tests::test_pipes_are_not_inheritable ... ok
test tests::test_parent_handles ... ok

test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.74s

     Running unittests (target/debug/deps/cat-b07bf0fda55996e4)

running 0 tests

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

     Running unittests (target/debug/deps/cat_both-6b98e0ae94d8eb96)

running 0 tests

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

     Running unittests (target/debug/deps/swap-87b80de883d8eaf8)

running 0 tests

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

   Doc-tests os_pipe

running 2 tests
test src/lib.rs - (line 47) ... ok
test src/lib.rs - (line 77) ... ok

test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.64s

[oconnor663]

Thank you! Do you need this released on crates.io, or is it good enough to have it in master?

[hoanga]

if there is a particular release cycle this crate tends to go through, i think waiting until then should be okay. thanks!

[oconnor663]

There isn't really, so I'll go ahead and tag v1.0.1 now.