shlobj: Add SHELL_LINK_DATA and new SHELL_LINK_DATA_FLAGS

The patch "shlobj.h.patch" adds the following to shlobj.h:

• "struct SHELL_LINK_DATA": The *.lnk file header
• new flags to "enum SHELL_LINK_DATA_FLAGS"

sdkddkver.h.patch defines NTDDI_WIN8 in sdkddkver.h (needed by shlobj.h.patch)

Sources:
http://code.google.com/p/lnk-parser/
http://msdn.microsoft.com/en-us/library/dd871305.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/bb762540%28v=vs.85%29.aspx