StimBuff,commonLibs: Add libattachmentSupport, move fnptrs into .cpp files

We move the methods in StimulusBuffer whose addresses are taken during
program execution into a separate static lib. This guarantees that
they'll have their own, single vaddr at runtime, at least within
each independent code module.

stimBuffApis/livoxGen1/CMakeLists.txt

@@ -24,6 +24,7 @@ if(ENABLE_STIMBUFFAPI_livoxGen1)
 	target_link_libraries(livoxGen1
 		${Boost_LIBRARIES}
 		${URING_LIBRARIES}
+		attachmentSupport
 	)
 	target_link_directories(livoxGen1 PUBLIC
 		${URING_LIBRARY_DIRS}