gpgme: fix a test after disallowing compressed signatures

/cc PR #180336

I'm not entirely sure about this, as I couldn't spend much time, but
it seemed plausible that the patch caused a different kind of errors
in this tested case - though it's possible I messed the test up.
Either way, the tests seem to pass now, unblocking the CVE fixes ;-)

pkgs/development/libraries/gpgme/default.nix

@@ -47,6 +47,9 @@ stdenv.mkDerivation rec {
     ./python-310-detection-without-distutils.patch
     # Find correct version string for Python >= 3.10, https://dev.gnupg.org/D546
     ./python-find-version-string-above-310.patch
+    # Fix a test after disallowing compressed signatures in gpg (PR #180336)
+    ./test_t-verify_double-plaintext.patch
+
     # Disable python tests on Darwin as they use gpg (see configureFlags below)
   ] ++ lib.optional stdenv.isDarwin ./disable-python-tests.patch
   # Fix _AC_UNDECLARED_WARNING for autoconf>=2.70