Add "post" option to fips_test_suite to run the POST only and exit.

fips/fips_test_suite.c

diff --git a/fips/fips_test_suite.c b/fips/fips_test_suite.c
index e07b6d6..fac20d4 100644
--- a/fips/fips_test_suite.c
+++ b/fips/fips_test_suite.c
@@ -892,6 +892,8 @@
 	    FIPS_corrupt_drbg();
 	} else if (!strcmp(argv[1], "rng")) {
 	    fail_id = FIPS_TEST_X931;
+	} else if (!strcmp(argv[1], "post")) {
+	    fail_id = -1;
 	} else if (!strcmp(argv[1], "rngstick")) {
 	    do_rng_stick = 1;
 	    no_exit = 1;