Updates to build system to have diff. config.h's for each arch

.gitattributes

Makefile

include/i686/config.h

include/x86_64/config.h

libIRDB/src/core/fileir.cpp

libIRDB/src/core/function.cpp

libIRDB/test/Makefile

libIRDB/test/calc_conflicts.cpp

libIRDB/test/fill_in_cfg.cpp

libIRDB/test/fill_in_indtargs.cpp

libIRDB/test/find_strings.cpp

libIRDB/test/read_ehframe.cpp

tools/meds2pdb/meds2pdb.cpp

xform/all.h

xform/elfreader.h

xform/function_descriptor.h

xform/instruction_descriptor.h

xform/null_transform.cpp

xform/rewriter.cpp