sync: Accomodate for new repo binary

* With current repo binary, .repo/local_manifest.xml is deprecated. New preferred location
  is .repo/local_manifests/local_manifest.xml. Check for the new directory, & if not there make it and curl
  local manf there instead.

Signed-off-by: bmc08gt <bmc08gt.teamb00sted@gmail.com>