move DisplaySink code out from yaxpeax-x86

it was built in-place around yaxpeax-x86, hoisted out once it seemed
suitable and could be generalized. yay!

also include a Makefile in yaxpeax-arch now to test that various crate
feature flag combinations.. work.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/testkit.rs b/src/testkit.rs
new file mode 100644
index 0000000..1018234
--- /dev/null
+++ b/src/testkit.rs
@@ -0,0 +1,2 @@
+#[cfg(feature="alloc")]
+pub mod display;