Also update DEPS to bring the latest dev_compiler into the SDK.
This is a second attempt at
https://codereview.chromium.org/1777173003, with the following fixes:
- Added .bat files for Windows.
- Added missing dependency: create_sdk_internal depends on
dartdevc.dart.snapshot.
- Used pkg_files.stamp to note the source code dependency for
dartdevc, so that we don't go beyond xcodebuild's input length
limit.
R=jmesserly@google.com
Review URL: https://codereview.chromium.org/1818543002 .