Add device abstraction code for the UEFI Console and UEFI Shell-based file systems.

Make argv use narrow characters instead of wide characters.
Add setenv functionality.
Add poll() system call.
Change signal names into macros – required for standards compliance.  The enums were renamed and moved to sys/signal.h and the new macros reference the enums.
Added SIGBREAK, which is required for Python.
Modify stdio functions to fail cleanly when called with a NULL File Pointer argument.
Added <sys/cdefs.h> that just includes <sys/EfiCdefs.h>.  By adding this wrapper, we improve compatibility with *nix files which assume <sys/cdefs> exists.
Add <netdb.h>
Added macros for bcopy(), bcmp() and strsep().
Modify the clock() function so that it does not hang when running under an emulation environment such as NT32.
Move TM structure specific macros from the private tzfile.h into <time.h>
Add strncasecmp function.
Add strptime function.
Add gettimeofday function.
Add getcwd function.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11908 6f19259b-4bc3-4df7-8a09-765794883524

StdLib/Include/sys/dirent.h

@@ -4,7 +4,7 @@
   The information is based upon the EFI_FILE_INFO structure
   in MdePkg/Include/Guid/FileInfo.h.
 
-  Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -49,6 +49,7 @@
 
 #include  <sys/featuretest.h>
 #include  <time.h>
+#include  <sys/time.h>
 
 #define MAXNAMLEN 511
 
@@ -66,10 +67,10 @@ struct dirent {
   UINT64    PhysicalSize;       // The amount of physical space the file consumes
                                   // on the file system volume.
   UINT64    Attribute;          // The time the file was created.
-  timespec  CreateTime;         // The time when the file was last accessed.
-  timespec  LastAccessTime;     // The time when the file’s contents were last modified.
-  timespec  ModificationTime;   // The attribute bits for the file. See below.
-  CHAR16    FileName[];         // The Null-terminated name of the file.
+  struct timespec  CreateTime;         // The time when the file was last accessed.
+  struct timespec  LastAccessTime;     // The time when the file’s contents were last modified.
+  struct timespec  ModificationTime;   // The attribute bits for the file. See below.
+  CHAR16    FileName[1];         // The Null-terminated name of the file.
 };
 
 /*