ima: show rules with IMA_INMASK correctly

ima: show rules with IMA_INMASK correctly

BugLink: https://bugs.launchpad.net/bugs/1838700
commit 8cdc23a3d9ec0944000ad43bad588e36afdc38cd upstream.

Show the '^' character when a policy rule has flag IMA_INMASK.

Fixes: 80eae209d63ac ("IMA: allow reading back the current IMA policy")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>