gh-158091: Check only the file name for _d in test_dll_dependency_import (#158099)

Author: lazerg

Lib/test/test_import/__init__.py

@@ -789,7 +789,7 @@ def test_dll_dependency_import(self):
         pydname = importlib.util.find_spec("_sqlite3").origin
         depname = os.path.join(
             os.path.dirname(pydname),
-            "sqlite3{}.dll".format("_d" if "_d" in pydname else ""))
+            "sqlite3{}.dll".format("_d" if "_d" in os.path.basename(pydname) else ""))
 
         with os_helper.temp_dir() as tmp:
             tmp2 = os.path.join(tmp, "DLLs")