Process source maps in Rust instead of JS (#1280)

- Improves speed and binary size significantly.
- Makes deno_last_exception() output a JSON structure.
- Isolate::execute and Isolate::event_loop now return
  structured, mapped JSError objects on errors.
- Removes libdeno functions:
  libdeno.setGlobalErrorHandler()
  libdeno.setPromiseRejectHandler()
  libdeno.setPromiseErrorExaminer()

In collaboration with Ryan Dahl.

1 files changed, 0 insertions, 0 deletions

diff --git a/third_party b/third_party
-Subproject e058979631fd3ecc55f8995a02eaa6ff8f35c32
+Subproject 7d8c9aa769778140e1619f545e706bf34545509