gh-133059: fix Tools/build/deepfreeze.py nsmallposints

Tools/build/consts_getter.py

@@ -1,12 +1,12 @@
-import os
+from pathlib import Path
 
-ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-INTERNAL = os.path.join(ROOT, 'Include', 'internal')
+ROOT = Path(__file__).resolve().parents[2]
+INTERNAL = ROOT / "Include" / "internal"
 
 def get_nsmallnegints_and_nsmallposints() -> tuple[int, int]:
     nsmallposints = None
     nsmallnegints = None
     with open(os.path.join(INTERNAL, 'pycore_runtime_structs.h')) as infile:
         for line in infile:
             if line.startswith('#define _PY_NSMALLPOSINTS'):
                 nsmallposints = int(line.split()[-1])