Kernel : Use SaberMod 4.7.4 Toolchain

Change-Id: If5ca3afefa0ab46d662bb97b75087320e45e8c8f
Rom : Use -O3 for Optimization

Change-Id: I63db46028d7ed54a72e5b23ea58095778fc5c69d
Disable -Wunused-parameter

Change-Id: I4289c7d97d1d9694dd74f23d2e0fee07d2374e67