target/hppa: Include "qemu/log.h" to use qemu_log()

Since his inception in 61766fe9, this file uses the qemu_log()
API from "qemu/log.h".  Include it to allow further includes
cleanup.
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180528232719.4721-9-f4bug@amsat.org>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

target/hppa/int_helper.c

@@ -19,6 +19,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/main-loop.h"
+#include "qemu/log.h"
 #include "cpu.h"
 #include "exec/exec-all.h"
 #include "exec/helper-proto.h"