Re-introduce the possibility to define CPPU_LEAK_STATIC_DATA. This
time use it to bypass just the assertions that check that the type
description counts really are zero at the end of the
TypeDescriptor_Init_Impl destructor.

Add more informative debugging printout of which counts are non-zero.

Define CPPU_LEAK_STATIC_DATA for x64 Windows for now. But we do get
the same assertions also on x86 Windows if cppu is built with
OSL_DEBUG_LEVEL>1.