Add SIMPLE_SNC_FIBER

[amir734jj]

Variant of simple-snc.aps but using fibers. This is truly a SNC because we have opposite order for the two children in assign_smt

env1 <= found2 <= env2 <= found2
env2 <= found2 <= env1 <= found1

And we can see static scheduling can't handle it but our improvement to Farrow should be able to handle it

/workspace/amir/aps/examples$ make simple-snc-fiber.scc.scala
../bin/aps2scala -C -DCOTo -p .:../base simple-snc-fiber
simple-snc-fiber.aps:113:Unable to handle dependency (23); Attribute grammar is not DNC
Compilation stopped due to analysis errors.
make: *** [Makefile:16: simple-snc-fiber.scc.scala] Error 1

[boyland]

Very interesting