benchmark: clean up system dependencies

* quaviver.asd (quaviver/benchmark): Remove no longer necessary
quaviver/ieee754 dependency, and move quaviver/burger-dybvig after
quaviver/native and quaviver/liebler after quaviver/jaffer, to follow
the order the systems are defined in.

quaviver.asd

@@ -203,12 +203,11 @@
  :depends-on ("the-cost-of-nothing"
  "cl-spark"
  "cl-ascii-table"
- "quaviver/burger-dybvig"
  "quaviver/native"
+ "quaviver/burger-dybvig"
  "quaviver/schubfach"
- "quaviver/liebler"
  "quaviver/jaffer"
- "quaviver/ieee754")
+ "quaviver/liebler")
  :components ((:module "code"
  :pathname "code/benchmark/"
  :serial t