Reformat all gn files in /third_party/jsoncpp.

`gn format` recently changed its formatting behavior
for deps, source, and a few other elements when they
are assigned (with =) single-element lists to be consistent
with the formatting of updates (with +=) with single-element.

Now that we've rolled in a GN binary with the change,
reformat all files so that people don't get presubmit
warnings due to this.

This CL was uploaded by git cl split.

R=jophba@chromium.org

Bug: 1041419
Change-Id: Ic2aafa890eb5086d597ea17f512446bc6408062d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1998267
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#731199}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 1915e99b6580ad492c0f3e7e3609ea8d6724941b
diff --git a/BUILD.gn b/BUILD.gn
index fd203e9..af4a1f1 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -53,13 +53,9 @@
 
 if (build_with_chromium) {
   fuzzer_test("jsoncpp_fuzzer") {
-    sources = [
-      "fuzzers/json_fuzzer.cc",
-    ]
+    sources = [ "fuzzers/json_fuzzer.cc" ]
 
-    deps = [
-      ":jsoncpp",
-    ]
+    deps = [ ":jsoncpp" ]
 
     include_dirs = [ "generated" ]