[kernel] Only serialize non-external libaries and sources from those.

Previously the VM couldn't handle external libraries, but that was
fixed in 2f4919852095ee3287d35e138184c11e29b3ce8d.

Part of the CL was reverted though because the compilatin was changed
to using an outline instead of the platform which doesn't work.
What does work though, is not including the external libraries in the
output.

This CL makes the following changes:

* Don't include external libraries in the output (by not setting all
  libraries to be non-external).

* Only writes the sources actually used to the binary (i.e. whatever
  libraries left out because they were external will not contribute
  source code either).

* Cleanup of now unused code.


Timings (only run once though):


Without this CL (but with the CL it's based on):

$ time python tools/test.py -m release -cdartk language -j6
Test configuration: dartk_vm_release_x64
[05:43 | 100% | + 3504 | -    0]

real    5m43.597s
user    33m48.152s
sys     9m34.140s


Only the "utils/kernel-service/kernel-service.dart" part of this CL:

$ time python tools/test.py -m release -cdartk language -j6
Test configuration: dartk_vm_release_x64
[04:55 | 100% | + 3504 | -    0]

real    4m55.684s
user    29m54.360s
sys     8m7.408s


Entire CL:

$ time python tools/test.py -m release -cdartk language -j6
Test configuration: dartk_vm_release_x64
[04:20 | 100% | + 3504 | -    0]

real    4m20.416s
user    27m17.320s
sys     6m53.472s

Change-Id: Ie9c5bfa958e558a5007784e821a0b58d417bae55
Reviewed-on: https://dart-review.googlesource.com/3161
Reviewed-by: Samir Jindel <sjindel@google.com>
5 files changed
tree: 18fcf7c5bd57489ca9d9fefb6990463d6c70009c
  1. build/
  2. client/
  3. docs/
  4. pkg/
  5. runtime/
  6. samples/
  7. samples-dev/
  8. sdk/
  9. tests/
  10. third_party/
  11. tools/
  12. utils/
  13. .clang-format
  14. .gitattributes
  15. .gitignore
  16. .gn
  17. .mailmap
  18. .packages
  19. .travis.yml
  20. AUTHORS
  21. BUILD.gn
  22. CHANGELOG.md
  23. codereview.settings
  24. DEPS
  25. LICENSE
  26. PATENTS
  27. PRESUBMIT.py
  28. README.dart-sdk
  29. README.md
  30. WATCHLISTS
README.md

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