Bug 1621564 - 75.0beta source tarballs dont contain third_party/rust/failure/.github-ci.yml -> failure to build r=froydnj

Differential Revision: https://phabricator.services.mozilla.com/D66373

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

toolkit/mozapps/installer/upload-files.mk

@@ -429,7 +429,10 @@ endif
 SRC_TAR_PREFIX = $(MOZ_APP_NAME)-$(MOZ_PKG_VERSION)
 SRC_TAR_EXCLUDE_PATHS += \
   --exclude='.hg*' \
-  --exclude='.git*' \
+  --exclude='.git' \
+  --exclude='.gitattributes' \
+  --exclude='.gitkeep' \
+  --exclude='.gitmodules' \
   --exclude='CVS' \
   --exclude='.cvs*' \
   --exclude='.mozconfig*' \