build-app.sh injects \$APP_NAME directly into the replacement half of
sed's s/// when patching Chromium's localized InfoPlist.strings. If
\$APP_NAME ever carries '/', '&', or '\\' — the command either breaks
or starts interpreting input as sed syntax. The trailing '|| true'
would then silently hide the failure and ship a DMG that still says
'Google Chrome for Testing' in the menu bar.
Escape replacement metachars before substitution. No change for the
default name 'GStack Browser'.
