Fix the issue to clear the high 16-bit of EAX before use it Thunk code.

This patch updates MdePkg BaseLib, EcpPkg EdkIIGlueLib BaseLib and ThunkLib.

Signed-off-by: lgao4
Reviewed-by: rsun3

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12877 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Foundation/Library/Thunk16/X64/Thunk16.S

@@ -148,7 +148,7 @@ Label_16Bit:
 
 Label:
       xor    %rax,%rax
-      movl   %ss,%eax
+      movw   %ss,%ax
       shl    $0x4,%eax
       add    %esp,%eax
       mov    %r15,%rsp

EdkCompatibilityPkg/Foundation/Library/Thunk16/X64/Thunk16.asm

@@ -144,7 +144,7 @@ _Thunk16    PROC    USES    rbp rbx rsi rdi r12 r13 r14 r15
     retf
 @@:
     xor     rax, rax
-    mov     eax, ss
+    mov     ax, ss
     shl     eax, 4
     add     eax, esp                    ; rax <- address of 16-bit stack
     mov     rsp, r15