Squashed 'third_party/allwpilib_2017/' content from commit 35ac87d

Change-Id: I7bb6f5556c30d3f5a092e68de0be9c710c60c9f4
git-subtree-dir: third_party/allwpilib_2017
git-subtree-split: 35ac87d6ff8b7f061c4f18c9ea316e5dccd4888a
diff --git a/hal/lib/athena/Constants.cpp b/hal/lib/athena/Constants.cpp
new file mode 100644
index 0000000..1f4517b
--- /dev/null
+++ b/hal/lib/athena/Constants.cpp
@@ -0,0 +1,18 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2016-2017. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "HAL/Constants.h"
+
+#include "ConstantsInternal.h"
+
+using namespace hal;
+
+extern "C" {
+int32_t HAL_GetSystemClockTicksPerMicrosecond(void) {
+  return kSystemClockTicksPerMicrosecond;
+}
+}