add a changelog and update the document for ORC (#20415)

* add a changelog and update the document for ORC

* hone

* back

* Apply suggestions from code review

Co-authored-by: Clay Sweetser <Varriount@users.noreply.github.com>

* Update doc/mm.md

Co-authored-by: Clay Sweetser <Varriount@users.noreply.github.com>

* Update doc/mm.md

Co-authored-by: Clay Sweetser <Varriount@users.noreply.github.com>
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
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ringabout 2022-09-27 01:32:08 +08:00 • committed by GitHub
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@ -127,8 +127,7 @@ Advanced options:
--skipParentCfg:on|off do not read the parent dirs' configuration files
--skipProjCfg:on|off do not read the project's configuration file
--mm:orc|arc|refc|markAndSweep|boehm|go|none|regions
select which memory management to use; default is 'refc'
recommended is 'orc'
select which memory management to use; default is 'orc'
--exceptions:setjmp|cpp|goto|quirky
select the exception handling implementation
--index:on|off turn index file generation on|off