am d4187efd: Merge "Switch x86 syscall stubs over to the ENTER/END style of the ARM stubs."

# Via Elliott Hughes (1) and Gerrit Code Review (1)
* commit 'd4187efd7f9c30ffaff4738862e3d08be27a52e9':
  Switch x86 syscall stubs over to the ENTER/END style of the ARM stubs.