e2fsprogs: need to include unistd.h, otherwise optind is undefined

Signed-off-by: Phil Sutter <phil.sutter@viprinet.com>

package/e2fsprogs/patches/patch-misc_e2undo_c

@@ -0,0 +1,11 @@
+	optind seems to need unistd.h, not only getopt.h
+--- e2fsprogs-1.41.12.orig/misc/e2undo.c	2010-05-14 00:59:49.000000000 +0200
++++ e2fsprogs-1.41.12/misc/e2undo.c	2010-10-18 12:03:49.329511558 +0200
+@@ -19,6 +19,7 @@
+ #if HAVE_ERRNO_H
+ #include <errno.h>
+ #endif
++#include <unistd.h>
+ #include "ext2fs/tdb.h"
+ #include "ext2fs/ext2fs.h"
+ #include "nls-enable.h"