crt: msvcr80.def.in: Fix X64 C++ symbols

It looks like that lib64/msvcr80.def.in file contains X64 C++ symbols not
from the msvcr80.dll library but from the Windows XP x64 msvcrt.dll
library. X64 version of msvcrt.dll and msvcr80.dll have different C++
symbols but relatively same set of C symbols.

Replace incorrect X64 C++ symbols in lib64/msvcr80.def.in file by the
correct symbols from Visual C++ 2005 SP1 X64 msvcr80.dll library.

Signed-off-by: Martin Storsjö <martin@martin.st>