Update to libsepol 2.2. Update to current upstream libsepol release. Includes memory leak fixes, improved handling of filename-based type transitions, and support for latest kernel policy version. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> (cherry picked from commit dedcd596b31e0e4fc15d75b3a8b5e6b61e6c28b3) Change-Id: I273e3aac223d25c918f71d566ea752b64ec59cd7