Make Python 3.11 compatible

Created using spr 1.3.6-beta.1

Author: pcc

compiler-rt/test/lit.common.cfg.py

@@ -969,7 +969,7 @@ def is_windows_lto_supported():
 def target_page_size():
     try:
         proc = subprocess.Popen(
-            f"{emulator or ""} python3",
+            f"{emulator or ''} python3",
             shell=True,
             stdin=subprocess.PIPE,
             stdout=subprocess.PIPE,