### Please describe the problem.

Adding an existing cloud repo on box.com results in an gpg error:

    user error (gpg ["--quiet","--trust-model","always","--batch","--passphrase-fd","86","--decrypt"] exited 2)

### What steps will reproduce the problem?

Enabling an existing cloud repository.

### What version of git-annex are you using? On what operating system?

Latest Android (4.20130516-g32 40006) on a rooted Samsung Galaxy Note (CyanogenMod 10.1)

### Please provide any additional information below.

[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/debug.log

(merging refs/synced/de8a8792-70de-48c3-a646-a168ce1d9d35/c25hdXRoQGphYmJlci5vcmc=/git-annex into git-annex...)
(Recording state in git...)
(gpg) gpg: can't open `/usr/local/share/gnupg/options.skel': No such file or directory
gpg: DBG: locking for `/sdcard/git-annex.home/.gnupg/secring.gpg.lock' done via O_EXCL
gpg: DBG: locking for `/sdcard/git-annex.home/.gnupg/pubring.gpg.lock' done via O_EXCL
gpg: encrypted with unknown algorithm 3
gpg: decryption failed: secret key not available
(gpg) gpg: encrypted with unknown algorithm 3
gpg: decryption failed: secret key not available
(gpg) gpg: encrypted with unknown algorithm 3
gpg: decryption failed: secret key not available
(gpg) gpg: encrypted with unknown algorithm 3
gpg: decryption failed: secret key not available

# End of transcript or log.
"""]]

> [[done]]; I have deployed the new gpg build for Android and the
> nightly Android app build is now using it. --[[Joey]]