libcap: backport Debian patches to fix CVE-2023-2602 and CVE-2023-2603

libcap: backport Debian patches to fix CVE-2023-2602 and CVE-2023-2603

import patches from ubuntu to fix
 CVE-2023-2602
 CVE-2023-2603

Upstream-Status: Backport [import from ubuntu https://git.launchpad.net/ubuntu/+source/libcap2/tree/debian/patches?h=ubuntu/focal-security
Upstream commit
https://git.kernel.org/pub/scm/libs/libcap/libcap.git/commit/?id=bc6b36682f188020ee4770fae1d41bde5b2c97bb
&
https://git.kernel.org/pub/scm/libs/libcap/libcap.git/commit/?id=422bec25ae4a1ab03fd4d6f728695ed279173b18]

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>