Patch for https://cov01.lab.eng.brq.redhat.com/el8-results/el8/libdb-5.3.28-31.el8+7/scan-results-imp.html#def1

diff -up db-5.3.28/db.1.85/PORT/clib/snprintf.c.add_stdio_h db-5.3.28/db.1.85/PORT/clib/snprintf.c

--- db-5.3.28/db.1.85/PORT/clib/snprintf.c.add_stdio_h	2019-02-11 10:01:03.386405802 +0100

+++ db-5.3.28/db.1.85/PORT/clib/snprintf.c	2019-02-11 10:01:26.805754113 +0100

@@ -2,6 +2,7 @@

 #include <sys/cdefs.h>

 #include <compat.h>

+#include <stdio.h>

 #ifdef __STDC__

 #include <stdarg.h>