add some atf/kyua tests for netpgpverify

% make test
...
cd tests/netpgpverify && make && atf-run
#    create  netpgpverify/Atffile
#     build  netpgpverify/t_netpgpverify
echo '#! /usr/bin/atf-sh' >t_netpgpverify.tmp
cat t_netpgpverify.sh >>t_netpgpverify.tmp
chmod +x t_netpgpverify.tmp
mv t_netpgpverify.tmp t_netpgpverify
atf2kyua: I: Removing stale Kyuafiles from /tmp/.XXXXXX.027471aa
atf2kyua: I: Converting /usr/src/crypto/external/bsd/agc-netpgp-standalone/tests/netpgpverify/Atffile -> /tmp/.XXXXXX.027471aa/Kyuafile
t_netpgpverify:netpgpverify_rsa  ->  passed  [0.138s]
t_netpgpverify:netpgpverify_dsa  ->  passed  [0.119s]

2/2 passed (0 failed)
Committed action 10

crypto/external/bsd/netpgp/tests/netpgpverify/Makefile

@@ -0,0 +1,9 @@
+# $NetBSD: Makefile,v 1.1.2.1 2012/11/01 01:41:24 agc Exp $
+
+.include <bsd.own.mk>
+
+TESTSDIR= ${TESTSBASE}/usr.bin/netpgpverify
+
+TESTS_SH+= t_netpgpverify
+
+.include <bsd.test.mk>