Roll src/third_party/re2/src/ 954656f47..ba541565b (1 commit)

https://chromium.googlesource.com/external/github.com/google/re2.git/+log/954656f47fe8..ba541565b4fb

$ git log 954656f47..ba541565b --date=short --no-merges --format='%ad %ae %s'
2023-01-23 junyer Introduce `bitmap256.cc` for `FindNextSetBit()`.

Created with:
  roll-dep src/third_party/re2/src

Bug: 0
Change-Id: Ib3bdb8eceb7640ac57bfd9b9cd19384c965d9f30
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4188802
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Paul Wankadia <junyer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1096061}
NOKEYCHECK=True
GitOrigin-RevId: 57465a71d93b4859694e499fbf41dd4123f70d1e
diff --git a/BUILD.gn b/BUILD.gn
index fbe4f66..bf90106 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -10,6 +10,7 @@
 
 static_library("re2") {
   sources = [
+    "src/re2/bitmap256.cc",
     "src/re2/bitmap256.h",
     "src/re2/bitstate.cc",
     "src/re2/compile.cc",