more bea->libIRDB-decode changes

libIRDB/include/decode/decode.hpp

libIRDB/include/decode/operand.hpp

libIRDB/src/decode/decode.cpp

libIRDB/src/decode/operand.cpp

libIRDB/test/fill_in_indtargs.cpp

libIRDB/test/fix_calls.cpp

tools/selective_cfi/SConscript

tools/selective_cfi/scfi_instr.cpp

tools/selective_cfi/tests/test_dude.sh