[ktap-scripts] fix address to function (need to subtract start/load address)
[ktap-scripts] analyze: from now we can use symbol names instead of addresses

After 316d29f862e4ec115b5ddec6cf325cd5d027c2c5 ("add new symbol module
to search symbols in DSO (for uprobes)") in ktap upstream.

See: https://github.com/ktap/ktap/commit/316d29f86