Bug 1451936 - use the correct free function in SignFile; r=fkiefer

Differential Revision: https://phabricator.services.mozilla.com/D1583

--HG--
extra : rebase_source : 5179e1b141d491d90256add8e6d2ae7ee363c491
extra : amend_source : 25b00f1fb7bf8c4cdcd989e7c691c79ddb2d365b
extra : histedit_source : 166b9c13c54d5803f0e278470d4490c953876420

cmd/pk1sign/pk1sign.c

@@ -178,7 +178,7 @@ SignFile(FILE *outFile, PRFileDesc *inFile, CERTCertificate *cert)
         SECKEY_DestroyPrivateKey(privKey);
     }
     if (data) {
-        PORT_Free(data);
+        PR_Free(data);
     }
     PORT_FreeArena(arena, PR_FALSE);