StdLib: Change the last argument of the ioctl helper functions to va_list* from void*.

StdLib: Change the last argument of the ioctl helper functions to va_list* from void*.

Functions which call these helper functions always pass the last parameter as a va_list argument.
Add a conditional block around a MSFT-only pragma so that stringlist.c will compile with GCC.
Comment-out the Socket Library components within StdLib.dsc.  These components are still in development.

Signed-off-by: darylm503
Reviewed by:   geekboy15A

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12369 6f19259b-4bc3-4df7-8a09-765794883524