eclass/xdg: upgrade for EAPI 7

BUG=b/181107685,b/181107526,b/181107515,b/181107276
TEST=presubmit
RELEASE_NOTE=None

cos-patch: lts-refresh
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2268632
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Allen Webb <allenwebb@google.com>
Commit-Queue: Brian Norris <briannorris@chromium.org>
Change-Id: I3b0d22c942dc73b56083363cfa7ae62db1e49c15
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/portage-stable/+/13174
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
1 file changed