first draft of mips support in lib-decode

SConscript

SMPStaticAnalyzer

irdb-libs/libEXEIO/include/exeio.h

irdb-libs/libEXEIO/src/exeio_elf.h

irdb-libs/libIRDB-core/include/decode_csmips.hpp

irdb-libs/libIRDB-core/include/operand_csmips.hpp

irdb-libs/libIRDB-core/src/SConscript

irdb-libs/libIRDB-core/src/decode_base.cpp

irdb-libs/libIRDB-core/src/decode_csmips32.cpp

irdb-libs/libIRDB-core/src/decode_csmips64.cpp

irdb-libs/libIRDB-core/src/operand_csmips32.cpp

irdb-libs/libIRDB-core/src/operand_csmips64.cpp

irdb-libs/meds2pdb/elfreader.cpp