Fix GCC build breaks.

Fix case mismatch for includes of "Socket.h".  Original code was <socket.h> while file was Socket.h in the same directory as the .c file.
Add EFIAPI to function declarations so that they match the definition.
Remove "ineffective" statements from stub functions.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12076 6f19259b-4bc3-4df7-8a09-765794883524

StdLib/Include/Efi/EfiSocketLib.h

@@ -112,13 +112,13 @@ typedef struct _DT_SERVICE DT_SERVICE;  ///<  Forward delcaration
 
 typedef
 EFI_STATUS
-(* PFN_SB_INITIALIZE) (
+(EFIAPI * PFN_SB_INITIALIZE) (
     DT_SERVICE * pService
     );
 
 typedef
 VOID
-(* PFN_SB_SHUTDOWN) (
+(EFIAPI * PFN_SB_SHUTDOWN) (
     DT_SERVICE * pService
     );