Additions for building via bazel

Author: cgilmour

BUILD.bazel

@@ -15,6 +15,7 @@ cc_library(
     "src/datadog/id_generator.cpp",
     "src/datadog/limiter.cpp",
     "src/datadog/logger.cpp",
+    "src/datadog/metrics.cpp",
     "src/datadog/msgpack.cpp",
     "src/datadog/null_collector.cpp",
     "src/datadog/parse_util.cpp",
@@ -32,6 +33,7 @@ cc_library(
     "src/datadog/tags.cpp",
     "src/datadog/threaded_event_scheduler.cpp",
     "src/datadog/tracer_config.cpp",
+    "src/datadog/tracer_telemetry.cpp",
     "src/datadog/tracer.cpp",
     "src/datadog/trace_id.cpp",
     "src/datadog/trace_sampler_config.cpp",
@@ -64,6 +66,7 @@ cc_library(
     "src/datadog/json_fwd.hpp",
     "src/datadog/limiter.h",
     "src/datadog/logger.h",
+    "src/datadog/metrics.h",
     "src/datadog/msgpack.h",
     "src/datadog/null_collector.h",
     "src/datadog/optional.h",
@@ -88,6 +91,7 @@ cc_library(
     "src/datadog/tags.h",
     "src/datadog/threaded_event_scheduler.h",
     "src/datadog/tracer_config.h",
+    "src/datadog/tracer_telemetry.h",
     "src/datadog/tracer.h",
     "src/datadog/trace_id.h",
     "src/datadog/trace_sampler_config.h",
@@ -110,4 +114,4 @@ cc_library(
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/types:optional",
     ],
-)
+)