Change some python to python3

- bazel 0.27 will default to python3 in this context
- I removed the "hackish" print statement, it does not crash. I assume
  the issue is fixed.
- list > int is not valid in python3 (it was always True in python 2)

debug/linking_utils/BUILD.bazel

@@ -30,9 +30,7 @@ def contains_error(error):
     return f
 
 # output should have some runpaths
-assert \
-    ldd(identity, sys.argv[1])['runpath_dirs']\
-    > 0
+assert len(ldd(identity, sys.argv[1])['runpath_dirs']) > 0
 
 # some of the dependencies are implicit and not in NEEDED flags
 assert ldd(contains_error(LDD_UNKNOWN), sys.argv[1])

tests/cc_haskell_import/python_add_one.py

@@ -9,10 +9,5 @@
 
 foreignlib = ctypes.cdll.LoadLibrary(path)
 
-# ATTN: If you remove this print *statement* hs_init will segfault!
-# If you use the python3 print *function*, it will segfault as well!
-# TODO: wtf?
-print foreignlib
-
 foreignlib.hs_init()
 assert(str(foreignlib.add_one_hs(1)) == "2")