patchformat.py: fix _guest_function_name()

Not only get function from '@@@@' line, also from
remove line. This may get correct function name
when we change the function define.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
patch: fix to format patch desc correctly

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
update version to dpatch-0.7

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>