Add flatbuffer definition for IMU board

This should match the spec in
https://docs.google.com/document/d/12AJUruW7DZ2pIrDzTyPC0qqFoia4QOSVlax6Jd7m4H0/edit

This message will be output by a process that listens to the can frame
channel and then listened to by a process that turns it into an
IMUValuesBatch message for regular consumption.

Change-Id: Iccdf7044f07c27363eb8ac0d3839058fd87a173a
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/frc971/imu_fdcan/BUILD b/frc971/imu_fdcan/BUILD
index e69de29..deb6a7e 100644
--- a/frc971/imu_fdcan/BUILD
+++ b/frc971/imu_fdcan/BUILD
@@ -0,0 +1,7 @@
+load("//aos/flatbuffers:generate.bzl", "static_flatbuffer")
+
+static_flatbuffer(
+    name = "dual_imu_fbs",
+    srcs = ["dual_imu.fbs"],
+    visibility = ["//visibility:public"],
+)