[domain_reliability] Enable jumbo build in components/domain_reliability

Using "use_jumbo_build=true" args in GN, speed up builds in
components/domain_reliability.

Bug: None
Change-Id: Ifaf4e19ce81dbc9fe284f841db83f0b5d9e0518f
Reviewed-on: https://chromium-review.googlesource.com/1193627Reviewed-by: Asanka Herath <asanka@chromium.org>
Commit-Queue: Byoungkwon Ko <codeimpl@gmail.com>
Cr-Commit-Position: refs/heads/master@{#588268}

components/domain_reliability/BUILD.gn

@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/jumbo.gni")
+
 action("bake_in_configs") {
   visibility = [ ":*" ]
   script = "bake_in_configs.py"
@@ -45,7 +47,7 @@ action("bake_in_configs") {
   ]
 }
 
-component("domain_reliability") {
+jumbo_component("domain_reliability") {
   sources = [
     "baked_in_configs.h",
     "beacon.cc",
@@ -92,7 +94,7 @@ component("domain_reliability") {
   ]
 }
 
-source_set("unit_tests") {
+jumbo_source_set("unit_tests") {
   testonly = true
   sources = [
     "config_unittest.cc",