Bug#1032408: Fixing the patch

[Chris Ward <tjcw01@gmail.com>]

I had my test parameters wrong; '-s' tests for size > 0, '-S' tests
for socket, '-L' tests for sym-link. I think the intended test is
'-e', file exists; and so the required patch is

tjcw@debian:/usr/lib/live/build$ git diff  binary_rootfs.0 binary_rootfs
diff --git a/binary_rootfs.0 b/binary_rootfs
index af8448d..080ee15 100755
--- a/binary_rootfs.0
+++ b/binary_rootfs
@@ -106,7 +106,7 @@ case "${LB_CHROOT_FILESYSTEM}" in
                                dd if=/dev/zero
of=chroot/filesystem.${LB_CHROOT_FILESYSTEM} bs=1024k count=0
seek=${REAL_DIM}

                                FAKE_MTAB=false
-                               if ! Chroot chroot "test -s /etc/mtab"
+                               if ! Chroot chroot "test -e /etc/mtab"
                                then
                                        Chroot chroot "ln -s
/proc/mounts/mtab /etc/mtab"
                                        FAKE_MTAB=true
tjcw@debian:/usr/lib/live/build$