Minor clang-format on third_party/BUILD.gn.

Just reorders some files.

Change-Id: I58845fe72fb8381fff32b0d81bb0561d6656c7be
Reviewed-on: https://dawn-review.googlesource.com/c/2900
Commit-Queue: Stephen White <senorblanco@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

third_party/BUILD.gn

@@ -240,8 +240,8 @@ static_library("glfw") {
       "${glfw_dir}/src/win32_joystick.h",
       "${glfw_dir}/src/win32_monitor.c",
       "${glfw_dir}/src/win32_platform.h",
-      "${glfw_dir}/src/win32_time.c",
       "${glfw_dir}/src/win32_thread.c",
+      "${glfw_dir}/src/win32_time.c",
       "${glfw_dir}/src/win32_window.c",
     ]
   }