target/arm/translate.h: expand comment on DISAS_EXIT
We already have an exit condition, DISAS_UPDATE which will exit the run-loop. Expand on the difference with DISAS_EXIT in the comments. Signed-off-by: NAlex Bennée <alex.bennee@linaro.org> Reviewed-by: NRichard Henderson <rth@twiddle.net> Message-id: 20170713141928.25419-4-alex.bennee@linaro.org Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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