Fix function declarations with ms_call_modifier being incorrect.

[eezstreet]

Previously, function declarations which had an ms_call_modifier were not being parsed correctly.

This brings the grammar in-line with the C grammar, which parses it correctly.

In the C grammar, this example line of code will parse correctly, but in the current C++ parser, will not parse correctly, which this pull request addresses:

const int __cdecl BITMANIP_GetSize();