More compiler warning fixes

These were in SUSE distris for quite some time and got
forwardported from 1.8.10 to 1.8.11.


Index: lib/ipmi_sdradd.c
===================================================================
--- lib/ipmi_sdradd.c.orig
+++ lib/ipmi_sdradd.c
@@ -38,6 +38,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <fcntl.h>
+#include <unistd.h>
 
 #include <ipmitool/helper.h>
 #include <ipmitool/log.h>
Index: lib/ipmi_hpmfwupg.c
===================================================================
--- lib/ipmi_hpmfwupg.c.orig
+++ lib/ipmi_hpmfwupg.c
@@ -40,6 +40,8 @@
 #include "../src/plugins/lan/md5.h"
 #include <stdio.h>
 #include <time.h>
+#include <ctype.h>
+#include <unistd.h>
 #include <sys/param.h>
 
 #if HAVE_CONFIG_H
Index: configure.in
===================================================================
--- configure.in.orig
+++ configure.in
@@ -25,6 +25,7 @@ AC_CHECK_HEADERS([sys/byteorder.h bytesw
 AC_C_CONST
 AC_C_INLINE
 AC_C_BIGENDIAN
+AC_GNU_SOURCE
 
 AC_FUNC_MALLOC
 AC_FUNC_SELECT_ARGTYPES