use the monolith build thing that's part of v8. In theory that should
do the right thing already.

Flag v8_use_snapshot = false added now.

The previous guess I made didn't make sense and was unrelated.

Should be related to the following runtime issue:

 #
 # Fatal error in , line 0
 # Failed to deserialize the V8 snapshot blob. This can mean that the
 snapshot blob file is corrupted or missing.
 #
 #
 #
 #FailureMessage Object: 0x7f40ed7b8230

This will also require a bunch of fixes in Starcry.