Transition to libbindgen sub-crate

- The root crate is the `bindgen` binary
- Rust-ify the test suite, no more subprocesses!
- Update Travis config to test both crates

1 files changed, 4 insertions, 0 deletions

diff --git a/libbindgen/tests/headers/enum_negative.h b/libbindgen/tests/headers/enum_negative.h
new file mode 100644
index 00000000..6cbdfe04
--- /dev/null
+++ b/libbindgen/tests/headers/enum_negative.h
@@ -0,0 +1,4 @@
+enum Foo {
+    Bar = -2,
+    Qux = 1,
+};