recipe_modules/chromite: Use "build_type".

scripts/slave/recipes/cros/cbuildbot.expected/chromiumos_coverage.json

Index: scripts/slave/recipes/cros/cbuildbot.expected/chromiumos_coverage.json
diff --git a/scripts/slave/recipes/cros/cbuildbot.expected/chromiumos_coverage.json b/scripts/slave/recipes/cros/cbuildbot.expected/chromiumos_coverage.json
index 6a2a755834e78733e4427ed8258df5db87db0365..3a7fb64ed332abea43155e1ee0d51f5cd3cade24 100644
--- a/scripts/slave/recipes/cros/cbuildbot.expected/chromiumos_coverage.json
+++ b/scripts/slave/recipes/cros/cbuildbot.expected/chromiumos_coverage.json
@@ -15,7 +15,7 @@
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
-      "chromite@factory-1412.B:",
+      "chromite@firmware-uboot_v2-1299.B:",
       "--output_manifest"
     ],
     "env": {
@@ -27,7 +27,7 @@
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"chromite\": \"factory-1412.B:\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"chromite\": \"firmware-uboot_v2-1299.B:\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"manifest\": {}, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
@@ -47,7 +47,7 @@
       "[ROOT]/cbuild/external_master",
       "--buildbot",
       "--branch",
-      "factory-1412.B",
+      "firmware-uboot_v2-1299.B",
       "--buildnumber",
       "0",
       "--chrome_rev",
@@ -55,7 +55,7 @@
       "--debug",
       "--clobber",
       "--config_repo",
-      "https://fake.googlesource.com/myconfig/repo.git",
+      "https://example.com/repo.git",
       "--repo-cache",
       "/var/cache/chrome-infra/ccompute-setup/cros-internal",
       "x86-generic-full"