rpcrt4: The NDR memory sizing functions should increment the buffer pointer, so make sure to save it before calling one of these and restore it afterwards.

rpcrt4: Make NdrBaseTypeMemorySize increment the buffer and memory size fields of MIDL_STUB_MESSAGE.

functions and adapt them to be callable without having a correlation
descriptor.

Check for HAVE_UNISTD_H before including unistd.h.
There is no HAVE_SYS_TYPES to check.
Tweak the indentation of a few #include directives.

Factorize a couple of call convention matching regular expressions.

Fix converting the typelib file name to Unicode by using the correct
buffer size.