fc_sort: update to latest

Update to commit:
  - https://github.com/TresysTechnology/refpolicy/commit/5490639ac99fcfa062a0b9825a111b9392a2da34



This solves all reported clang analyzer issues and is inline with upstream.

Test: veerify that md5sum of output files do not change.

Change-Id: I942145b8f9748c8ecd185f730c94d57cb77f5acc
Signed-off-by: William Roberts <william.c.roberts@intel.com>