[gn] Port linux_use_bundled_binutils_override GN variable

Ports https://codereview.chromium.org/2293853002 to unblock
deps roller.

BUG=474921
TBR=jochen@chromium.org, kjellander@chromium.org, vogelheim@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2290233005
Cr-Commit-Position: refs/heads/master@{#39034}

build_overrides/build.gni

@@ -17,6 +17,9 @@ build_with_chromium = false
 # Some non-Chromium builds don't support building java targets.
 enable_java_templates = false
 
+# Some non-Chromium builds don't use Chromium's third_party/binutils.
+linux_use_bundled_binutils_override = true
+
 # Allows different projects to specify their own suppressions files.
 asan_suppressions_file = "//build/sanitizers/asan_suppressions.cc"
 lsan_suppressions_file = "//build/sanitizers/lsan_suppressions.cc"