Bump NQP_REVISION, which also bumps MOAR_REVISION.

* Fix leaks and an invalid read in synchronous sockets on errors
  (jnthn++)
* Fix NFA generation for the constructs `x ** 1..2` and `:i <[A..Z]>`,
  and harden NFA processing in MoarVM so as to not read out of bounds
  (jnthn++)
* Fix some small memory leaks on startup and module load when there
  are augmented types (jnthn++)
* Support East_Asian_Width property (samcv++)
* Speed up radix operations (samcv++)
* JIT more radix operations (MasterDuke17++)

tools/build/NQP_REVISION

@@ -1 +1 @@
-2017.01-15-g7cbefd90
+2017.01-46-g501c53f