Bump the gdb packet size.
fix typo in prepare_syscallbuf_records()

'sizeof(sizeof(struct))'
I think must be one 'sizeof(struct)'
fix reversed memset arguments in iterate_checksums
Revert "fix typo in prepare_syscallbuf_records()"

This reverts commit 943c367e3c443948dcfd1626dbab9c8138342f0f.
Merge remote-tracking branch 'maksqwe/util_fix'