build: add --write-snapshot-as-array-literals to configure.py
This makes it easier to locate indeterminism in the snapshot, with the following command:
$ ./configure --write-snapshot-as-array-literals $ make V= $ mv out/Release/obj/gen/node_snapshot.cc ./node_snapshot.cc $ make V= $ diff out/Release/obj/gen/node_snapshot.cc ./node_snapshot.cc