gnu: pius: Really add the patch file.

* gnu/packages/patches/pius.patch: New file.

This is a follow-up to commit a92d97266d.

gnu/packages/patches/pius.patch

@@ -0,0 +1,38 @@
+See https://github.com/jaymzh/pius/pull/96
+
+commit 4dba0bf75ab351969622f7b9c38484657411a528
+Author: Martin Kletzander <nert.pinx+github@gmail.com>
+Date:   Thu May 17 17:55:27 2018 +0200
+
+    Don't fail on ENCRYPTION_COMPLIANCE_MODE line from too new GnuPG (#96)
+    
+    GnuPG started printing information about encryption compliance in [commit
+    f31dc2540acf](https://dev.gnupg.org/rGf31dc2540acf7cd7f09fd94658e815822222bfcb)
+    and since then signing with pius fails.
+    
+    Closes #95
+    
+    Signed-off-by: Martin Kletzander <nert.pinx@gmail.com>
+
+diff --git a/libpius/signer.py b/libpius/signer.py
+index 3c7262f..13013bb 100644
+--- a/libpius/signer.py
++++ b/libpius/signer.py
+@@ -45,6 +45,7 @@ class PiusSigner(object):
+   GPG_PINENTRY_LAUNCHED = '[GNUPG:] PINENTRY_LAUNCHED'
+   GPG_KEY_CONSIDERED = '[GNUPG:] KEY_CONSIDERED'
+   GPG_WARN_VERSION = '[GNUPG:] WARNING server_version_mismatch'
++  GPG_ENC_COMPLIANT_MODE = '[GNUPG:] ENCRYPTION_COMPLIANCE_MODE'
+ 
+   def __init__(self, signer, force_signer, mode, keyring, gpg_path, tmpdir,
+                outdir, encrypt_outfiles, mail, mailer, verbose, sort_keyring,
+@@ -431,6 +432,9 @@ class PiusSigner(object):
+       if PiusSigner.GPG_ENC_BEG in line:
+         debug('Got GPG_ENC_BEG')
+         continue
++      elif PiusSigner.GPG_ENC_COMPLIANT_MODE in line:
++        debug('Got ENCRYPTION_COMPLIANCE_MODE')
++        continue
+       elif PiusSigner.GPG_ENC_END in line:
+         debug('Got GPG_ENC_END')
+         break