[ssci] mark asan_symbolize mark as non-shipped

This dependency is a utility script to symbolize crash reports produced
by ASan builds and aren't shipped in a chromium / chrome build

Change-Id: I6e02efd8f265de67f8fe7695d6d60a071114e6ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/8127267
Reviewed-by: Lei Zhang <thestig@chromium.org>
Auto-Submit: Jiewei Qian <qjw@chromium.org>
Commit-Queue: Jiewei Qian <qjw@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1666885}
NOKEYCHECK=True
GitOrigin-RevId: 73ecc3a1a5e22ddd25bd9393f75fa7feb3669623

asan/third_party/README.chromium

diff --git a/asan/third_party/README.chromium b/asan/third_party/README.chromium
index bfbb67a..8b62497 100644
--- a/asan/third_party/README.chromium
+++ b/asan/third_party/README.chromium
@@ -6,6 +6,6 @@
 Update Mechanism: Manual
 URL: https://github.com/llvm/llvm-project/blob/a81e45b8bcb8eb274ad73357e10e2cdf8a314a8c/compiler-rt/lib/asan/scripts/asan_symbolize.py
 Security Critical: no
-Shipped: yes
+Shipped: no
 
 asan_symbolize.py is a verbatim copy of asan_symbolize.py in the LLVM trunk.