Improve CMakeLists.txt auto regeneration.

Check that the re-generation could actually run ninja.

Specify the gn_deps by absolute path names.

Depend on the gn_to_cmake.py generator.

Change-Id: I5f93031d35f0b239b899fe1716fb1f6a4c67f77e
Reviewed-on: https://skia-review.googlesource.com/137397
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Herb Derby <herb@google.com>
1 file changed