Implemented ILGetDisplayNameExA and ILGetDisplayNameExW and call them

[wine] / dlls / dmsynth / dmsynth.spec

# Linked to main dmusic.dll for easier implementation

1 stdcall DllCanUnloadNow() dmusic.DllCanUnloadNow
2 stdcall DllGetClassObject( long long ptr ) dmusic.DllGetClassObject
3 stdcall DllRegisterServer() dmusic.DllRegisterServer
4 stdcall DllUnregisterServer() dmusic.DllUnregisterServer