Python 3 - Port use of string.maketrans and don't use sets.Set.

`sets.Set` has been deprecated in favor of `set` since 2.6, and
`string.maketrans` has to be special cased.  In Python 3 there
is `str.maketrans`, `bytes.maketrans`, and `bytearray.maketrans`
and you have to choose the correct one.  So we need to introduce
a runtime version check at this site.

llvm-svn: 252348

lldb/packages/Python/lldbsuite/test/dotest.py

@@ -1726,8 +1726,10 @@ def run_suite():
 
             if iterArchs or iterCompilers:
                 # Translate ' ' to '-' for pathname component.
-                from string import maketrans
-                tbl = maketrans(' ', '-')
+                if six.PY2:
+                    tbl = string.maketrans(' ', '-')
+                else:
+                    tbl = str.maketrans(' ', '-')
                 configPostfix = configString.translate(tbl)
 
                 # Check whether we need to split stderr/stdout into configuration

lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py

@@ -13,7 +13,6 @@ import platform
 import random
 import re
 import select
-import sets
 import signal
 import socket
 import subprocess
@@ -785,7 +784,7 @@ class GdbRemoteTestCaseBase(TestBase):
 
     def select_modifiable_register(self, reg_infos):
         """Find a register that can be read/written freely."""
-        PREFERRED_REGISTER_NAMES = sets.Set(["rax",])
+        PREFERRED_REGISTER_NAMES = set(["rax",])
 
         # First check for the first register from the preferred register name set.
         alternative_register_index = None