Changeset 456 for branches/RWT/lib/generic_cache_rwt

Introduction of RWT branch
New components :
-dspin_rwt_param (Cleanup Data, Rename dspin_dhccp_param to dspin_rwt_param)
-generic_cache_rwt (STATE : VALID_CC and VALID_NCC)
-vci_cc_vcache_wrapper (Hybrid cache Write-Through / Write-Back,

Cleanup Data, dirty bit, local CAS, new pktid for NCC miss read)

-vci_mem_cache (Support for Cleanup Data, Bit coherent for directory entry,

support NCC to CC mecanism)