Apply clang-format to folly/tracing/

Summary: [Folly] Apply `clang-format` to `folly/tracing/`.

Reviewed By: Orvid

Differential Revision: D5460511

fbshipit-source-id: c7a7d34211044a1b76934f184a8552a96d0bad91

folly/tracing/StaticTracepoint-ELFx86.h

@@ -16,6 +16,8 @@
 
 #pragma once
 
+// clang-format off
+
 // Default constraint for the probe arguments as operands.
 #ifndef FOLLY_SDT_ARG_CONSTRAINT
 #define FOLLY_SDT_ARG_CONSTRAINT      "nor"

folly/tracing/StaticTracepoint.h

@@ -23,5 +23,7 @@
   FOLLY_SDT_PROBE_N(                   \
       provider, name, FOLLY_SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__)
 #else
-#define FOLLY_SDT(provider, name, ...) do {} while(0)
+#define FOLLY_SDT(provider, name, ...) \
+  do {                                 \
+  } while (0)
 #endif