Updates for return shadow stack

.gitattributes

libMEDSannotation/include/MEDS_AnnotationBase.hpp

libMEDSannotation/include/MEDS_AnnotationParser.hpp

...EDSannotation/include/MEDS_InstructionCheckAnnotation.hpp

libMEDSannotation/include/MEDS_SafeFuncAnnotation.hpp

libMEDSannotation/include/VirtualOffset.hpp

libMEDSannotation/src/MEDS_AnnotationParser.cpp

libMEDSannotation/src/MEDS_InstructionCheckAnnotation.cpp

libMEDSannotation/src/MEDS_SafeFuncAnnotation.cpp

libMEDSannotation/src/Makefile

libtransform/include/integertransform.hpp

libtransform/include/integertransform32.hpp

libtransform/include/integertransform64.hpp

libtransform/src/integertransform.cpp

libtransform/src/integertransform32.cpp

libtransform/src/integertransform64.cpp

tools/Makefile

tools/ret_shadow_stack/Makefile

tools/ret_shadow_stack/rss_driver.cpp

tools/ret_shadow_stack/rss_instrument.cpp