[build] Improve readability in deps in ffmpeg

Change-Id: I9933a330cb2d44d6b19e68493a6217216024d894
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/ffmpeg/+/1032253
Reviewed-by: Roland McGrath <mcgrathr@google.com>

BUILD.gn

diff --git a/BUILD.gn b/BUILD.gn
index 1af7437..1b17945 100755
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -190,11 +190,10 @@
   cflags = []
   ldflags = []
   libs = []
-  deps = [
-    # TODO(https://fxbug.dev/98632): workaround for toolchain issues.
-    "//build/config/fuchsia:uses-outline-atomics-fxbug98632",
-    "//third_party/opus",
-  ]
+  deps = [ "//third_party/opus" ]
+
+  # TODO(https://fxbug.dev/98632): workaround for toolchain issue with LTO.
+  deps += [ "//build/config/fuchsia:uses-outline-atomics-fxbug98632" ]
 
   configs += [
     ":ffmpeg_warnings",