sagemathgh-37702: Workaround for multiprocessing shared memory limits

This affects musl libc and macos, see:
sagemath#36741 (comment)

We are working on a better fix to avoid using multiprocessing in
sage.features (cf
sagemath#36741 (comment)),
but this will do meanwhile.

There is agreement that disabling the lock is completely harmless, since
the counter is not really used for anything; disabling the lock fixes
the issues that we had on 10.4.beta0.

### 📝 Checklist

- [x] The title is concise and informative.
- [x] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.

URL: sagemath#37702
Reported by: Gonzalo Tornaría
Reviewer(s): Sebastian Oehms

build/pkgs/configure/checksums.ini

@@ -1,4 +1,4 @@
 tarball=configure-VERSION.tar.gz
-sha1=461fc89608a23f5e06c75bdd0a7480527fc3fa66
-md5=94145a9c6e55496266631d06c3d7fdeb
-cksum=613494009
+sha1=48bc6e2a97fbe3f4c243bb4d2ae9b2290d2ffb1b
+md5=50711242ccc3dbf90ae9018d1b1eeb9e
+cksum=3666009533

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-e9456b2da71c424d3ff188d5bb75e3c60f42be16
+40019799db820be4fc4738af1dae97b992c9de55

src/sage/features/__init__.py

@@ -162,7 +162,7 @@ def __init__(self, name, spkg=None, url=None, description=None, type='optional')
         # shared among subprocesses. Thus we use the Value class from the
         # multiprocessing module (cf. self._seen of class AvailableSoftware)
         from multiprocessing import Value
-        self._num_hidings = Value('i', 0)
+        self._num_hidings = Value('i', 0, lock=False)
 
         try:
             from sage.misc.package import spkg_type