Make test suite workable with GnuPG 2.1.
* tests/gpg/start-stop-agent: New. * tests/gpg/initial.test: New. * tests/gpg/final.test: New. * tests/gpg/Makefile.am (c_tests): New. (TESTS): Move all to c_tests. Add initial.test, final.test, and c_tests. (TESTS_ENVIRONMENT): Add C_ALL=C (private_keys): New. (EXTRA_DIST): Add new files. (./private-keys-v1.d/gpg-sample.stamp): Copy private keys. (all-local): Depend on gpg-sample.stamp. * tests/gpg/13CBE3758AFE42B5E5E2AE4CED27AFA455E3F87F: New. * tests/gpg/13CD0F3BDF24BE53FE192D62F18737256FF6E4FD: New. * tests/gpg/76F7E2B35832976B50A27A282D9B87E44577EB66: New. * tests/gpg/7A030357C0F253A5BBCD282FFC4E521B37558F5C: New. * tests/gpg/A0747D5F9425E6664F4FFBEED20FBCA79FDED2BD: New.
GnuPG 2.1 requires that the agent knows the private keys. Thus we
need to install them. The code should still work with GnuPG < 2.1.
To make the whole testing using a agent more robust, the way to start
the agent has also be changed.