- Issue #22176: Update the ctypes module's libffi to v3.1.  This release
  adds support for the Linux AArch64 and POWERPC ELF ABIv2 little endian
  architectures.
 - Issue #22176: Add src/x86/win32.S for x86 libffi builds.
 - Issue #22176: Fix build failure on ARM with -Werror=declaration-after-statement
add -Werror=declaration-after-statement only to stdlib extension modules (closes #21121)

Patch from Stefan Krah.