Fix multiple personalities support in parser of io_submit syscall

Fix multiple personalities support in parser of io_submit syscall

Introduce a new helper function to fetch tracee's long integers
and use it to fix multiple personalities support in io_submit parser.

* defs.h (umove_long_or_printaddr): New prototype.
* util.c (umove_long_or_printaddr): New function.
* aio.c (sys_io_submit): Use it to fetch tracee's pointers.
* tests/aio.c: New file.
* tests/aio.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add aio.
(TESTS): Add aio.test.
* tests/.gitignore: Add aio.