[test] fix t/op/basic.t with -r, and -r error msg

need to use like for -r, as the first pass failed already and
we get "Can't stat t/op/basic_9.pbc, code 2" for the 2nd cmd.
Fixes GH #1107
[docs] Harmonize NAME of Task PMC
native_pbc: generate big-endian 64 bit pbcs for 6.9.0

generated on darwin (linux or bsd is also trivial) with qemu mips64
on a debian image, with gcc-multilib and --cc|ld|link="cc -mabi=64"

See https://people.debian.org/~aurel32/qemu/mips/
qemu-system-mips64 -M malta -kernel vmlinux-2.6.32-5-5kc-malta \
  -hda debian_squeeze_mips_standard.qcow2 \
  -append "root=/dev/sda1 console=tty0" &
login: user; su -; apt-get install gcc-multilib git rsync perl sudo
Supported Release 6.9.0

See the ChangeLog and the end of api.yaml
coro: refactor return code. problem: wrong continuation

let Parrot_sub_continuation_rewind_environment return from_sub
for continuation.invoke.
let yield carry a 2nd state: 2 for .return
fix .return() mostly [GH# 1106]
remove unneeded empty ctx check in coroutine.invoke back from coro

changed t/pmc/coroutine.t to match the new implementation.
Fixed: 9, 13, 14, 15, 16
Remaining todo:
-  2: wrong returncc cont to label, regression (also syn_7)
- 14: wrong cont
[test] change regressing returncc label from coro to return value
trace: print Coro similar to Sub with -t1
coro: fix dead state with and without autoreset

we do not error when the coro returns from return/returncc.
we rather error when a dead coro is called, new yield state 2.
coro: do not reset cont address