Only include AIO syscall wrappers on Linux

[freeekanayaka]

Fixes #125.

[brauner]

The travis complaint is a bit weird. Mergeable despite the failure?

[freeekanayaka]

The travis complaint is a bit weird. Mergeable despite the failure?

Oh yeah, good catch. I forgot to add -DHAVE_LINUX_AIO_ABI_H when compiling the amalgamated single-source file.

Travis is happy now, should be good to merge, thanks.

[Kerollmops]

There also is an import of <linux/aio_abi.h> in the uv_os.h file. Is it meant to be fixed by this PR?

EDIT: I just read #125 and IIUC it is only meant to make the project compile when libuv is disabled!

[freeekanayaka]

There also is an import of <linux/aio_abi.h> in the uv_os.h file. Is it meant to be fixed by this PR?

Not for now. If you build uv support for now you need linux. Perhaps this could be fixed by the windows port PR.

[freeekanayaka]

There also is an import of <linux/aio_abi.h> in the uv_os.h file. Is it meant to be fixed by this PR?

Not for now. If you build uv support for now you need linux. Perhaps this could be fixed by the windows port PR.

(this PR is only meant to support building without uv on non-linux)