valgrind warnings with ld-2.15.so

[zooko]

From #44:

Hm, now the warning is back in a subsequent run:

​https://tahoe-lafs.org/buildbot-pycryptopp/builders/Ruben%20Fedora/builds/49/steps/double%20load%20valgrind/logs/valgrind

Let's see, here was the rebuild-the-exact-same-version (95c78ce5f08b03be70e5d69e5eb09d7acc1ce420) that I did earlier and it came out valgrind-clean:

​https://tahoe-lafs.org/buildbot-pycryptopp/builders/Ruben%20Fedora%20syslib/builds/41

And here is the rebuild of the exact same version again:

​https://tahoe-lafs.org/buildbot-pycryptopp/builders/Ruben%20Fedora%20syslib/builds/48

And the same valgrind warnings are back.

David-Sarah told me to use a search engine, and I found this plausible explanation for this warning from Jakub Jellinek:

​https://bugzilla.redhat.com/show_bug.cgi?id=159701

[zooko]

This particular valgrind warning fixed (suppressed) by [6f7d772b70ca2ccd2833056787b254bb9e2a38f7]. There are other valgrind warnings though...

[davidsarah]

Mousing over [6f7d772b70ca2ccd2833056787b254bb9e2a38f7], I get 'No changeset ... in the repository'.