Reformat BUCK files

Summary: Reformat BUCK files to better conform with style.

Reviewed By: zertosh

Differential Revision: D5901515

fbshipit-source-id: 93e8c56450f65b691af9017d880e6cf2a2cdb7af

benchmark/BUCK

@@ -10,6 +10,8 @@ include_defs("//YOGA_DEFS")
 cxx_binary(
     name = "benchmark",
     srcs = glob(["*.c"]),
+    headers = subdir_glob([("", "*.h")]),
+    header_namespace = "",
     compiler_flags = [
         "-fno-omit-frame-pointer",
         "-fexceptions",
@@ -18,8 +20,6 @@ cxx_binary(
         "-O3",
         "-std=c11",
     ],
-    header_namespace = "",
-    headers = subdir_glob([("", "*.h")]),
     visibility = ["PUBLIC"],
     deps = [
         yoga_dep(":yoga"),