debuginfo: Added support for region pointers.
debuginfo: Added test case for region pointers pointing to stack values with basic type.
debuginfo: Added test cases for region pointers into heap boxes for basic types.
debuginfo: Fixed some instances of gdb wrongly printing u8/i8 values as chars.
debuginfo: Added more tests for region pointers (tuples, structs).
debuginfo: Added test case for local variables declared with destructuring.
debuginfo: Added test case for function arguments.