Add mb configs for betty-arc-r CrOS bot.

Bug: 1120109
Change-Id: Icbe6f8f000d4ff1db68445ffdabf931a6ce19aa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2368136Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804380}

tools/mb/mb_config.pyl

@@ -15,6 +15,7 @@
   'masters': {
     'chrome': {
       'chromeos-arm-generic-cfi-thin-lto-chrome': 'chromeos_arm-generic_cfi_thin_lto_official',
+      'chromeos-betty-arc-r-chrome': 'chromeos_betty-arc-r_include_unwind_tables_official_use_fake_dbus_clients',
       'chromeos-betty-pi-arc-cfi-thin-lto-chrome': 'chromeos_betty-pi-arc_cfi_thin_lto_official',
       'chromeos-betty-pi-arc-chrome': 'chromeos_betty-pi-arc_include_unwind_tables_official_use_fake_dbus_clients',
       'chromeos-eve-chrome': 'chromeos_eve_include_unwind_tables_official',
@@ -798,6 +799,7 @@
 
     'tryserver.chrome': {
       'chromeos-arm-generic-cfi-thin-lto-chrome': 'chromeos_arm-generic_cfi_thin_lto_official',
+      'chromeos-betty-arc-r-chrome': 'chromeos_betty-arc-r_include_unwind_tables_official_use_fake_dbus_clients',
       'chromeos-betty-pi-arc-cfi-thin-lto-chrome': 'chromeos_betty-pi-arc_cfi_thin_lto_official',
       'chromeos-betty-pi-arc-chrome': 'chromeos_betty-pi-arc_include_unwind_tables_official_use_fake_dbus_clients',
       'chromeos-eve-arc-r-chrome': 'chromeos_eve-arc-r_include_unwind_tables_official',
@@ -1549,6 +1551,10 @@
       'chromeos_lto_link_jobs',
     ],
 
+    'chromeos_betty-arc-r_include_unwind_tables_official_use_fake_dbus_clients': [
+      'chromeos_device', 'betty-arc-r', 'include_unwind_tables', 'official', 'use_fake_dbus_clients',
+    ],
+
     'chromeos_betty-pi-arc_include_unwind_tables_official_use_fake_dbus_clients': [
       'chromeos_device', 'betty-pi-arc', 'include_unwind_tables', 'official', 'use_fake_dbus_clients',
     ],
@@ -2502,6 +2508,10 @@
       'gn_args': 'enable_autofill_assistant_api=true',
     },
 
+    'betty-arc-r': {
+      'args_file': '//build/args/chromeos/betty-arc-r.gni',
+    },
+
     'betty-pi-arc': {
       'args_file': '//build/args/chromeos/betty-pi-arc.gni',
     },