tests/test-revert-flags.out

Skip older monotone versions for tests.

test-convert-mtn is known to work with 0.37 and 0.38, but fails with
0.31 (Debian etch). hghave now skips all versions up to 0.31.

% reverting to rev 0
reverting foo
M foo
diff --git a/foo b/foo
old mode 100755
new mode 100644