add CHANGES entry for embed

 _______________

 Changes between 1.0.2 and 1.1.0  [xx XXX xxxx]

  *) New ASN.1 embed macro.

     New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the

     structure is not allocated: it is part of the parent. That is instead of

     FOO *x;

     it must be:

     FOO x;

     This reduces memory fragmentation and make it impossible to accidentally

     set a mandatory field to NULL.

     This currently only works for some fields specifically a SEQUENCE, CHOICE,

     or ASN1_STRING type which is part of a parent SEQUENCE. Since it is

     equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or

     SEQUENCE OF.

     [Steve Henson]

  *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled.

     [Emilia Käsper]