Make load order of local manifests deterministic

Local manifest files stored in the local_manifests folder are loaded
in alphabetical order, so it's easier to know in which order project
removals/additions/modifications will be applied.

If local_manifests.xml exists, it will be loaded before the files in
local_manifests.

Change-Id: Ia5c0349608f1823b4662cd6b340b99915bd973d5
2 files changed