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/LibC/Uefi/StubFunctions.c

@@ -21,7 +21,6 @@
 struct passwd *
 getpwuid (uid_t uid)
 {
-  uid;
   errno = EPERM;
   return NULL;
 }
@@ -35,7 +34,6 @@ char *getlogin (void)
 struct passwd *
 getpwnam (const char *name)
 {
-  name;
   errno = EPERM;
   return NULL;
 }