After writing the new PE header and original section contents of the
dartaotruntime PE executable, pad to the expected file offset of the
new section being added, not just to file alignment.
Also fixes a case where the new section's file offset returned from appendSnapshotAndWrite could be incorrect if the header size changed, which causes the file offsets for all sections, including the new one,
to be updated.
TEST=pkg/dartdev/test/commands/compile_test.dart
Change-Id: I060176f6771e9138f8d1a99590d455fc76bb573e
Cq-Include-Trybots: luci.dart.try:pkg-win-release-try,pkg-win-release-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/410720
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
Tess Strickland
eff0832b0f