[media] Suppress unused but set warning in third party code

Bug: 77973
Change-Id: If0093e2aa14ce6f0ef20c0578dc8e45e0d09e4c2
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/560665
Fuchsia-Auto-Submit: Shai Barack <shayba@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
Reviewed-by: Austin Foxley <afoxley@google.com>
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index a5f6c0a..8dd8a82 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -821,6 +821,7 @@
     "//src/connectivity/network/tools/nc/third_party/openbsd-netcat/*",
     "//src/connectivity/wlan/drivers/third_party/*",
     "//src/graphics/drivers/msd-intel-gen/src",
+    "//src/media/codec/codecs/sw/low_layer/aac:*",
     "//third_party/*",
     "//vendor/*",
     "//zircon/third_party/uapp/dash",
diff --git a/src/media/codec/codecs/sw/low_layer/aac/BUILD.gn b/src/media/codec/codecs/sw/low_layer/aac/BUILD.gn
index 71d98d2..a4f4aa8 100644
--- a/src/media/codec/codecs/sw/low_layer/aac/BUILD.gn
+++ b/src/media/codec/codecs/sw/low_layer/aac/BUILD.gn
@@ -236,5 +236,6 @@
   configs += [
     # TODO(fxbug.dev/58162): delete the below and fix compiler warnings
     "//build/config:Wno-conversion",
+    "//build/config:Wno-unused-but-set-variable",
   ]
 }