message: Fix missing comma
  Summary: I was a bit too quick in making the change before landing, forgot the comma in the build file
  Reviewers: georgep
diff: @@ -82,7 +82,7 @@ cc_library(
  "driver/matcher_predicates.cc",
  "driver/not_supported_gather_expander.cc",
  "driver/not_supported_scatter_expander.cc",
  - "driver/root_token_replacer.cc"
  + "driver/root_token_replacer.cc",
  "driver/scheduler.cc",
  "driver/sharding_pass.cc",
  "driver/single_hlo_matcher.cc",
  @@ -118,7 +118,7 @@ cc_library(
  "driver/meta_graph.h",
  "driver/not_supported_gather_expander.h",
  "driver/not_supported_scatter_expander.h",
  - "driver/root_token_replacer.h"
  + "driver/root_token_replacer.h",
  "driver/scheduler.h",
  "driver/sharding_pass.h",
  "driver/single_hlo_matcher.h",
  