library/GSM_RestOctets: initial SI2quater Rest Octets definition

This is a very minimalistic (incomplete) implementation of SI2quater
Rest Octets as per 3GPP TS 44.018, table 10.5.2.33b.1.  Should be
enough to decode some of the E-UTRAN specific parameters though.

Some BITn fields might need to be replaced with more specific
enumerated or integer types.  Beware [1], the bit ordering rules
are different for integer and bitstring (sub-)types if a field
ends up on boundary of the two octets!

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=562488

Change-Id: I6a12c9ee12f8df8b4fc0976dd593152dc1195718
Related: SYS#4870
1 file changed