Expose hy_arch_detect().

Related: RhBug:1072972
py: cosmetic: drop py_ prefixes from static functions in hawkeymodule.c.

They serve no purpose.
New version: 0.4.14
build: 0.4.14-1
added nevra filter flag to query C API
added python bindings to nevra attribute filter
replaced deprecated fail_unless with ck_assert_int_eq
distro-sync doesn't replace arch (RhBug:1054909)