leak-detective: (re-)whitelist some OpenSSL functions

Some static allocations in plugins won't get freed, because in the test case
process the plugins are not destroyed. If a plugin would clean up allocations
done while just using the plugin, these show up as leak in the child process,
letting tests fail.

src/libstrongswan/utils/leak_detective.c

@@ -483,6 +483,11 @@ char *whitelist[] = {
 	"gcry_check_version",
 	"gcry_randomize",
 	"gcry_create_nonce",
+	/* OpenSSL: These are needed for unit-tests only, the openssl plugin
+	 * does properly clean up any memory during destroy(). */
+	"ECDSA_do_sign_ex",
+	"ECDSA_verify",
+	"RSA_new_method",
 	/* NSPR */
 	"PR_CallOnce",
 	/* libapr */