Blackbox: Handling single statements

Useless statement are now placed in a function in order to be blackboxed
later.

 * main.go,
   transform/dependencies_rework.go: Modified.
1 job for hm/blackbox-block in 51 seconds (queued for 4 seconds)
Name Stage Failure
failed
debian-stable-gcc Test
FAIL: passes/select.go
FAIL: passes/slices.go
FAIL: passes/struct.go
FAIL: passes/switch.go
FAIL: passes/variablename.go
27 errors found!
make: *** [Makefile:39: check] Error 1
Cleaning up file based variables
ERROR: Job failed: exit code 1