SDK: build 'monitor' tool and package it in the SDK.

Fixed with Siva to use the 'ant' builder from Eclipse's baseBuilder jars.

Changed to use:
- the new external/eclipse-basebuilder for the basebuilder jars.
- the rcp deltapack, located prebuilts/eclipse.
- monitor scripts are now in sdk/monitor.
- configuration is now in out/host/eclipse/rcp/build/configuration
  and doesn't change any existing repos.

Requires change I7ab027ff6 from build.git

Change-Id: I72fff09231fc9b3031c10eb42ff821c55af9b5d5
13 files changed