* upstart/wire.c (upstart_push_int, upstart_pop_int) 
(upstart_push_unsigned, upstart_pop_unsigned): Convert to array-style
type first format.
(upstart_push_string, upstart_push_header): Write the length and
type fields out by hand so they don't get an 'i' prefix.
(upstart_pop_string, upstart_pop_header): Read the length and type
fields by hand so they don't get an 'i' prefix.
* upstart/tests/test_wire.c (test_push_int, test_pop_int) 
(test_push_unsigned, test_pop_unsigned): Update test cases to match.
(test_push_pack, test_pop_pack): Pack format was changed too.