Fix undeclared type name errors when targeting android aarch64.

Bump to 0.2.2

There are 8 bits in a byte

Reorganize mips/musl/other slightly

Fixes a few constants along the way

This reverts commit 767ba143.

Closes #49

Add NI_MAXHOST

Add a whole mess more android constants

bind additional filesystem APIs

Add time bindings

Fix forgotten ::size_t for freebsd

openbsd port

- remove multiple definition of stack_t
- make types resolv correctly
- correct target definitions
  - dragonfly is already defined as freebsdlike
  - bitrig is an openbsdlike
- imports should be public

Add socketpair

Only run libc-test on nightly

Otherwise just make sure the library builds on other Rust versions

Add getaddrinfo functions

Add dladdr bindings

Add more sigset functions