[roll third_party/pigweed] pw_symbolizer: Expose llvm_symbolizer_binary

Allow the caller to specify the llvm_symbolizer_binary to use whenever
initializing the LlvmSymbolizer object.

Original-Bug: 322189439
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/189355

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 0d068e1b005f616..fa9b84d9739fe94
Roller-URL: https://ci.chromium.org/b/8757806097899708881
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4b3b9fddb26ca0e9e69358e5f9bc1241a173029c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/189362
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 0d068e1..fa9b84d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 0d068e1b005f616708a5c1192f9ae3644476c3b1
+Subproject commit fa9b84d9739fe94cae13cbff984e11898fb51ae4