Bump Windows toolchain

Updates to LLVM 14, hopefully fixing #21964.

(cherry picked from commit b2bb3e62)

.gitlab-ci.yml

@@ -6,7 +6,7 @@ variables:
 
   # Sequential version number of all cached things.
   # Bump to invalidate GitLab CI cache.
-  CACHE_REV: 8
+  CACHE_REV: 10
 
   # Disable shallow clones; they break our linting rules
   GIT_DEPTH: 0

mk/get-win32-tarballs.py

@@ -8,7 +8,7 @@ import argparse
 import sys
 from sys import stderr
 
-TARBALL_VERSION = '0.7'
+TARBALL_VERSION = '0.8'
 BASE_URL = "https://downloads.haskell.org/ghc/mingw/{}".format(TARBALL_VERSION)
 DEST = Path('ghc-tarballs/mingw-w64')
 ARCHS = ['x86_64', 'sources']