Free a variable

Fix a memory leak in storeutl.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6373)
diff --git a/apps/storeutl.c b/apps/storeutl.c
index 0f310d2..50007f6 100644
--- a/apps/storeutl.c
+++ b/apps/storeutl.c
@@ -308,6 +308,7 @@
                   text, noout, recursive, 0, out, prog);
 
  end:
+    OPENSSL_free(fingerprint);
     OPENSSL_free(alias);
     ASN1_INTEGER_free(serial);
     X509_NAME_free(subject);