pw_tokenizer: C version of hash function

Change-Id: I4b62699dca1dcb5f9477a0338fff1cf32bec6c43
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/22780
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Wyatt Hepler <hepler@google.com>
diff --git a/pw_tokenizer/BUILD b/pw_tokenizer/BUILD
index 431aa4b..350d463 100644
--- a/pw_tokenizer/BUILD
+++ b/pw_tokenizer/BUILD
@@ -27,6 +27,7 @@
     name = "pw_tokenizer",
     srcs = [
         "encode_args.cc",
+        "hash.cc",
         "public/pw_tokenizer/config.h",
         "public/pw_tokenizer/internal/argument_types.h",
         "public/pw_tokenizer/internal/argument_types_macro_4_byte.h",