Add chrome/chrome_cleaner to rewrite_raw_ptr_fields manual ignore paths

Exclude chrome/chrome_cleaner/ from the rewrite as it does not ship with the Chrome binary.

Bug: 1080832
Change-Id: I0a1975e2e157155d9808bc9e2715e360e2057ab5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2467041Reviewed-by: Bartek Nowierski <bartekn@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816472}

tools/clang/rewrite_raw_ptr_fields/manual-paths-to-ignore.txt

@@ -21,6 +21,7 @@ ppapi/
 
 # Exclude tools that do not ship in the Chrome binary. Can't depend on //base.
 base/android/linker/
+chrome/chrome_cleaner/
 tools/
 net/tools/