sim: bpf: fix printf warnings on 32-bit systems

Use PRI macros to display 64-bit types instead of assuming long is
a 64-bit type itself.

sim/bpf/ChangeLog

@@ -1,3 +1,7 @@
+2021-06-28  Mike Frysinger  <vapier@gentoo.org>
+
+	* bpf.c (bpfbf_exit): Use PRI 64 formats.
+
 2021-06-27  Mike Frysinger  <vapier@gentoo.org>
 
 	* cpu.c (bpfbf_record_trace_results): Delete function.

sim/bpf/bpf.c

@@ -186,7 +186,7 @@ bpfbf_exit (SIM_CPU *current_cpu)
   /*  r0 holds "return code" */
   DI r0 = GET_H_GPR (0);
 
-  printf ("exit %ld (0x%lx)\n", r0, r0);
+  printf ("exit %" PRId64 " (0x%" PRIx64 ")\n", r0, r0);
 
   sim_engine_halt (sd, current_cpu, NULL, CPU_PC_GET (current_cpu),
                    sim_exited, 0 /* sigrc */);