Many C API calls, both from CPython and externally, expect
PyTypeObject* for the type argument.  A misdeclaration is
a warning in C, but an error in C++.

The C type of other builtins, such as lists, are not typically
required in function signatures, so they are left as PyObject*.

Fixed some memory leaks in Utility/Embed.c

Fixed __Pyx_sst_abs with C++11

Found by clang's static analyzer.
None of those are significant, but we might as well fix them.

Some compilers appear to require you to explicitly `#include <cstdlib>` before
providing `std::abs`.

deep-copy finally clauses of try-finally statements earlier to properly support arbitrary statements in them (genexprs, lambdas, etc.)

write XML results before printing test results to make it more likely that we get a test result dump also on later crashes or hangs