wrap: ensure the tempfile used for downloading is closed

This is generally a good idea, and the tempfile is already instructed to
not auto-delete on close. It also fixes a bug on PyPy, where the file
isn't valid because it's not explicitly closed. This is probably due to
the garbage collection modes -- in CPython, the object goes out of scope
and gets automatically closed before we actually attempt to unpack it.

Fixes #11246

mesonbuild/wrap/wrap.py

@@ -676,7 +676,7 @@ class Resolver:
             except urllib.error.URLError as e:
                 mlog.log(str(e))
                 raise WrapException(f'could not get {urlstring} is the internet available?')
-        with contextlib.closing(resp) as resp:
+        with contextlib.closing(resp) as resp, tmpfile as tmpfile:
             try:
                 dlsize = int(resp.info()['Content-Length'])
             except TypeError: