Ensure the 'en_US.utf8' locale is installed via install-build-deps

In recent jammy upgrades of some machine types, we've noticed that they
don't have the en_US.utf8 installed or set as the default, leading to
some test failures, eg:
https://luci-milo.appspot.com/ui/p/chrome/builders/ci/linux64/142828/overview

install-build-deps tries to install needed locales, but skips
en_US.utf8, probably because it's never been needed before. But
apparently starting with jammy it looks like it is needed. So this will
just explicitly install that locale as well. Should be safe if it's
already installed.

Bug: b/304850354
Change-Id: I836401ee5853dd7b41f61d86a8ca650fc9b326f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4932673
Reviewed-by: Thomas Anderson <[email protected]>
Commit-Queue: Ben Pastene <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1208920}


CrOS-Libchrome-Original-Commit: d584e918146f9e94b6590c167a9369b31659a0aa

Author: bpastene

build/install-build-deps.py

@@ -875,7 +875,7 @@ def install_chromeos_fonts(options):
 def install_locales():
   print("Installing locales.", file=sys.stderr)
   CHROMIUM_LOCALES = [
-      "da_DK.UTF-8", "fr_FR.UTF-8", "he_IL.UTF-8", "zh_TW.UTF-8"
+      "da_DK.UTF-8", "en_US.utf8", "fr_FR.UTF-8", "he_IL.UTF-8", "zh_TW.UTF-8"
   ]
   LOCALE_GEN = "/etc/locale.gen"
   if os.path.exists(LOCALE_GEN):