hush: implement break and continue

function                                             old     new   delta
bltins                                               252     276     +24
builtin_continue                                       -      12     +12
builtin_break                                          -      12     +12
static.version_str                                    18      17      -1
run_list                                            1984    1948     -36
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(add/remove: 2/0 grow/shrink: 1/2 up/down: 48/-27)             Total: 11 bytes

2 files changed