Get some basic Teensy code working

It prints some stuff over the USB serial port and turns the on-board LED
on. Also tweak some of the existing code so it works with better
compiler options for what we're doing.

Change-Id: Ifcbd36f9eaca47a86f7a97e8c458c64f9b3df3ab
diff --git a/debian/libusb.BUILD b/debian/libusb.BUILD
new file mode 100644
index 0000000..3ccffe1
--- /dev/null
+++ b/debian/libusb.BUILD
@@ -0,0 +1,13 @@
+cc_library(
+  name = 'libusb',
+  visibility = ['//visibility:public'],
+  srcs = [
+    'lib/x86_64-linux-gnu/libusb.so',
+  ],
+  hdrs = [
+    'include/usb.h',
+  ],
+  includes = [
+    'include',
+  ],
+)