Add OpenBSD and FreeBSD CI to Travis
This commit adds support to test all libc definitions on both OpenBSD and
FreeBSD via QEMU userspace emulation. Specially prepared images for each OS are
used which are essentially intended to run a script on startup and then exit.
Documentation has been added to the `ci/README.md` file describing this new
system.
diff --git a/libc-test/src/main-generated.rs b/libc-test/src/main-generated.rs
new file mode 100644
index 0000000..608fe4e
--- /dev/null
+++ b/libc-test/src/main-generated.rs
@@ -0,0 +1,9 @@
+// Note that this main file is meant to mirror `main.rs` but is only used on the
+// BSDs where the generated location of `all.rs` is slightly different
+
+#![allow(bad_style, improper_ctypes)]
+extern crate libc;
+
+use libc::*;
+
+include!("../all.rs");