oeqa/selftest/runtime_test: Exclude gpg directory from pseudo database

Avoid pseudo abort()s like:
path mismatch [1 link]: ino 6295376 db '/tmp/oeqa-feed-sign-2mw7z81v/S.gpg-agent.yocto-native' req '/tmp/jwkivmu6'.

(From OE-Core rev: 189630ca6cdf7ceb6cf9b8f9d86c58997f505efc)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/runtime_test.py

@@ -161,6 +161,7 @@ class TestImage(OESelftestTestCase):
         features += 'PACKAGE_FEED_GPG_NAME = "testuser"\n'
         features += 'PACKAGE_FEED_GPG_PASSPHRASE_FILE = "%s"\n' % os.path.join(signing_key_dir, 'key.passphrase')
         features += 'GPG_PATH = "%s"\n' % self.gpg_home
+        features += 'PSEUDO_IGNORE_PATHS .= ",%s"\n' % self.gpg_home
         self.write_config(features)
 
         # Build core-image-sato and testimage