Add Socket Libraries.

Add Posix functions for porting compatibility.
Fix compliance issues with ISO/IEC 9899:199409
New Functions:
  setenv(), fparseln(), GetFileNameFromPath(), rename(),
  realpath(), setprogname(), getprogname(), strlcat(), strlcpy(),
  strsep(), setitimer(), getitimer(), timegm(), getopt(), basename(),
  mkstemp(), ffs(), vsnprintf(), snprintf(), getpass(), usleep(), select(),
  writev(), strcasecmp(), getcwd(), chdir(), tcgetpgrp(), getpgrp(), gettimeofday(),
  bcopy(), 


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12061 6f19259b-4bc3-4df7-8a09-765794883524

StdLib/Include/sys/syslimits.h

@@ -37,7 +37,7 @@
 #include <sys/featuretest.h>
 
 #define ARG_MAX    (2 * 1024) /* max bytes for an exec function */
-#define ARGC_MAX    (ARG_MAX / 2)   /* Maximum value for argc */
+#define ARGC_MAX       (64)   /* Maximum value for argc */
 
 #ifndef CHILD_MAX
   #define CHILD_MAX     128 /* max simultaneous processes */