largefiles: add examination of exec bit in "hg status --rev REV" case...
largefiles: add examination of exec bit in "hg status --rev REV" case
Before this patch, "hg status --rev REV" doesn't list largefiles up
with "M" mark, even if exec bit of them is changed, because
"lfilesrepo.status" doesn't examine exec bit in such case.
