checkpolicy: update to version 3.3

checkpolicy: update to version 3.3

Update VERSIONs to 3.3 for release.
checkpolicy: Fix potential undefined shifts
Update VERSIONs to 3.3-rc3 for release.
checkpolicy: delay down-cast to avoid align warning
checkpolicy: drop incorrect cast
checkpolicy: update documentation
checkpolicy: print reason of fopen failure
checkpolicy: policy_define: cleanup declarations
Update VERSIONs to 3.3-rc2 for release.
checkpolicy: free extended permission memory
checkpolicy: print warning on source line overflow
checkpolicy: error out on parsing too big integers
checkpolicy: avoid implicit conversion
checkpolicy: resolve dismod memory leaks
checkpolicy: add missing function declarations
checkpolicy: mark file local functions in policy_define static
checkpolicy: mark read-only parameters in module compiler const
checkpolicy: misc checkpolicy tweaks
checkpolicy: misc checkmodule tweaks
checkpolicy: enclose macro argument in parentheses
Update VERSIONs and Python bindings version to 3.3-rc1 for release
checkpolicy: mark read-only parameters in policy define const
checkpolicy/test: mark file local functions static
checkpolicy: parse_util drop unused declaration
checkpolicy: drop redundant cast to the same type
checkpolicy: avoid potential use of uninitialized variable
checkpolicy: check before potential NULL dereference
checkpolicy: remove dead assignments
checkpolicy: follow declaration-after-statement
checkpolicy: use correct format specifier for unsigned
checkpolicy: drop dead condition
checkpolicy: simplify assignment
checkpolicy: drop -pipe compile option
checkpolicy: pass CFLAGS at link stage
checkpolicy: silence -Wextra-semi-stmt warning
checkpolicy: Do not automatically upgrade when using "-b" flag
libsepol/checkpolicy: Set user roles using role value instead of dominance

Signed-off-by: Dominick Grift <dominick.grift@defensec.nl>