extension version groups present in the RRC release 10
ASN.1 file (extensions between [[ and ]]).

Basically we do a syntactic replacement at compile time.
    [[ becomes '<name> SEQUENCE {'
    ]] becomes '} OPTIONAL'

<name> is 'ext<N>' where N is a number
increasing at each new extension group
in a given definition.

The UPER encoding for the two syntaxes is identical
(as far as y understanding of the specifications goes).

The XER encoding is different, due to the new 'ext<N>'
name.

Other encodings may be different.

The real solution is to fix the ASN.1 compiler.
This is not a simple task.



git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7705 818b1a75-f10b-46b9-bf7c-635c3b92a50f