win32: remove excessive flushing
Our Windows file code was flushing buffers from the operating system
to disk, rather than from the application to the operating system.
#!/bin/sh
echo % test --time
hg --time help -q help 2>&1 | grep Time > /dev/null || echo --time failed
echo % test --profile
if "$TESTDIR/hghave" -q hotshot; then
# hotshot might be missing for licensing issues
hg --profile help -q help 2>&1 | grep ncalls > /dev/null || echo --profile failed
fi
echo % test --lsprof
if "$TESTDIR/hghave" -q lsprof; then
hg --lsprof help -q help 2>&1 | grep CallCount > /dev/null || echo --lsprof failed
fi