Fix for Fennec 4.0rc1 build3 deb sign fails on keyError 'l10n-dir' p=aki r=lsblakk
Fix for Fennec 4.0rc1 build3 deb sign fails on keyError 'l10n-dir' p=aki r=lsblakk

mrrrgn/build-mozharness,kartikgupta0909/mozilla-mozharness,mrrrgn/build-mozharness,mozilla/build-mozharness,kartikgupta0909/gittest,lundjordan/mozharness,walac/build-mozharness,simar7/build-mozharness,lundjordan/mozharness,kartikgupta0909/mozilla-mozharness,kartikgupta0909/build-mozharness,armenzg/build-mozharness,kartikgupta0909/build-mozharness,escapewindow/mozharness,armenzg/build-mozharness,walac/build-mozharness,simar7/build-mozharness,lissyx/build-mozharness,mozilla/build-mozharness,escapewindow/mozharness,kartikgupta0909/gittest,lissyx/build-mozharness