Land rapid7#7118 - fix stack offset/size for x64 prependmigrate

Fixes rapid7#7117

Author: OJ

lib/msf/core/payload/windows/prepend_migrate.rb

@@ -461,9 +461,9 @@ def prepend_migrate_64(buf)
 
       ; create the process
       push 0                    ; keep the stack aligned
-      lea rdi,[rsp+0x110]       ; Offset of empty space for lpProcessInformation
+      lea rdi,[rsp+0x120]       ; Offset of empty space for lpProcessInformation
       push rdi                  ; lpProcessInformation : write processinfo here
-      lea rcx,[rsp+0x58]
+      lea rcx,[rsp+0x60]
       push rcx                  ; lpStartupInfo : current info (read)
       xor rcx,rcx
       push rcx                  ; lpCurrentDirectory