Fix up all the newly imported Teensy code

Change-Id: Id051083a16336617add1d5f16fc7b7d78a30a5fe
diff --git a/motors/usb/BUILD b/motors/usb/BUILD
new file mode 100644
index 0000000..801f926
--- /dev/null
+++ b/motors/usb/BUILD
@@ -0,0 +1,24 @@
+cc_library(
+  name = 'usb',
+  visibility = ['//visibility:public'],
+  hdrs = [
+    'usb_desc.h',
+    'usb_serial.h',
+    'usb_dev.h',
+  ],
+  srcs = [
+    'usb_mem.h',
+    'usb_names.h',
+
+    'usb_desc.c',
+    'usb_serial.c',
+    'usb_dev.c',
+    'usb_mem.c',
+  ],
+  defines = [
+    'USB_SERIAL=1',
+  ],
+  deps = [
+    '//motors/core',
+  ],
+)