security_context_t marked as deprecated in libselinux 3.1

Hi all,

Per the following commit in upstream SELinux, security_context_t has
been marked as deprecated, generating complains with
-Wdeprecated-declarations:
https://github.com/SELinuxProject/selinux/commit/7a124ca2758136f49cc38efc26fb1a2d385ecfd9

This can be seen with Debian GID when building contrib/selinux/, as it
we have libselinux 3.1 there.  Per the upstream repo,
security_context_t maps to char * in include/selinux/selinux.h, so we
can get rid easily of the warnings with the attached that replaces
the references to security_context_t.  Funnily, our code already mixes
both definitions, see for example sepgsql_set_client_label, so this
clarifies things.

Any thoughts?
--
Michael