New API: ntfs_chmod

Add an API to do the equivalent of `chmod [-r] MODE PATH` for
NTFS filesystems.

Files created on a linux ntfs-3g mount can not change permissions
directly. New files and directories are created with rough windows
equivalent of `chmod 777`. These wide open permissions can generate
security warnings on windows after virt-v2v installs bits into
`Program Files\Guestfs`.

Behind the scenes we use `ntfssecaudit(8)` from `ntfsprogs`
which is already part of the appliance. We only expose the chmod-style
feature; the rest of `ntfssecaudit` is concerned reporting and
managing fine grained windows security info which is way more than
we need.

Also note, `ntfssecaudit` needs to run on an unmounted partition
so using this is more complicated than a traditional `chmod` call.

Related: https://issues.redhat.com/browse/RHEL-104352

Signed-off-by: Cole Robinson <crobinso@redhat.com>

gobject/Makefile.inc

@@ -97,6 +97,7 @@ guestfs_gobject_headers= \
   include/guestfs-gobject/optargs-mktemp.h \
   include/guestfs-gobject/optargs-mount_9p.h \
   include/guestfs-gobject/optargs-mount_local.h \
+  include/guestfs-gobject/optargs-ntfs_chmod.h \
   include/guestfs-gobject/optargs-ntfsclone_out.h \
   include/guestfs-gobject/optargs-ntfsfix.h \
   include/guestfs-gobject/optargs-ntfsresize.h \
@@ -193,6 +194,7 @@ guestfs_gobject_sources= \
   src/optargs-mktemp.c \
   src/optargs-mount_9p.c \
   src/optargs-mount_local.c \
+  src/optargs-ntfs_chmod.c \
   src/optargs-ntfsclone_out.c \
   src/optargs-ntfsfix.c \
   src/optargs-ntfsresize.c \