Add coverage

tools/telemetry/third_party/coverage/coverage/ctracer/stats.h

Index: tools/telemetry/third_party/coverage/coverage/ctracer/stats.h
diff --git a/tools/telemetry/third_party/coverage/coverage/ctracer/stats.h b/tools/telemetry/third_party/coverage/coverage/ctracer/stats.h
new file mode 100644
index 0000000000000000000000000000000000000000..ceba79bd5203dab3c4faadbe9ed882992f9a6c31
--- /dev/null
+++ b/tools/telemetry/third_party/coverage/coverage/ctracer/stats.h
@@ -0,0 +1,30 @@
+/* Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 */
+/* For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt */
+
+#ifndef _COVERAGE_STATS_H
+#define _COVERAGE_STATS_H
+
+#include "util.h"
+
+#if COLLECT_STATS
+#define STATS(x)        x
+#else
+#define STATS(x)
+#endif
+
+typedef struct Stats {
+    unsigned int calls;     /* Need at least one member, but the rest only if needed. */
+#if COLLECT_STATS
+    unsigned int lines;
+    unsigned int returns;
+    unsigned int exceptions;
+    unsigned int others;
+    unsigned int new_files;
+    unsigned int missed_returns;
+    unsigned int stack_reallocs;
+    unsigned int errors;
+    unsigned int pycalls;
+#endif
+} Stats;
+
+#endif /* _COVERAGE_STATS_H */