Fix building spidermonkey on systems with python 3.10

Fix building spidermonkey on systems with python 3.10

Tested by:

Langbart - macOS 10.15.7: homebrewed python 3.9.9 & 3.10.1
andy5995 - Manjaro 21.2.3: python 3.10.2
s0600204 - ArchLinux: python 3.10.2

Bug: https://wildfiregames.com/forum/topic/65901-christmas-testing-bundle/#comment-472056
Origin: upstream, commit:https://trac.wildfiregames.com/changeset/26475
Origin: https://code.wildfiregames.com/D4437
Bug-Debian: https://bugs.debian.org/1008075

Gbp-Pq: Name fix-build-mozjs-with-python-3.10.patch