Fixed building with a bazel with hdrs_check fixed again.

Change-Id: I015f66cd6e02e07efa367b96edd775015ac0abca
diff --git a/frc971/BUILD b/frc971/BUILD
new file mode 100644
index 0000000..4729bf6
--- /dev/null
+++ b/frc971/BUILD
@@ -0,0 +1,15 @@
+package(default_visibility = ['//visibility:public'])
+
+cc_library(
+  name = 'shifter_hall_effect',
+  hdrs = [
+    'shifter_hall_effect.h',
+  ],
+)
+
+cc_library(
+  name = 'constants',
+  hdrs = [
+    'constants.h',
+  ],
+)