Bug 1620854 - Tarball generation should also exclude git files. r=froydnj

Differential Revision: https://phabricator.services.mozilla.com/D65906

--HG--
extra : moz-landing-system : lando

toolkit/mozapps/installer/upload-files.mk

@@ -429,6 +429,7 @@ endif
 SRC_TAR_PREFIX = $(MOZ_APP_NAME)-$(MOZ_PKG_VERSION)
 SRC_TAR_EXCLUDE_PATHS += \
   --exclude='.hg*' \
+  --exclude='.git*' \
   --exclude='CVS' \
   --exclude='.cvs*' \
   --exclude='.mozconfig*' \