Use a DYNAMIC that has hopscotch-map as a submodule

Fixes #3337

Makefile

@@ -587,7 +587,7 @@ $(INC_DIR)/lru_cache.h: $(DEP_DIR)/lru_cache/*.h $(DEP_DIR)/lru_cache/*.cc
 $(INC_DIR)/dynamic/dynamic.hpp: $(DYNAMIC_DIR)/include/dynamic/*.hpp $(DYNAMIC_DIR)/include/dynamic/*/*.hpp
 	rm -Rf $(INC_DIR)/dynamic.hpp $(INC_DIR)/dynamic
 	# annoyingly doesn't have an install option on the cmake, so we manually move their external dependency headers
-	cd $(CWD)/$(DYNAMIC_DIR) && rm -Rf build && mkdir -p build && cd build && export CXXFLAGS="$(CPPFLAGS) $(CXXFLAGS)" && cmake -DCMAKE_VERBOSE_MAKEFILE=ON .. && make && cp -r hopscotch_map-prefix/src/hopscotch_map/include/* $(CWD)/$(INC_DIR)/
+	cd $(CWD)/$(DYNAMIC_DIR) && rm -Rf build && mkdir -p build && cd build && export CXXFLAGS="$(CPPFLAGS) $(CXXFLAGS)" && cmake -DCMAKE_VERBOSE_MAKEFILE=ON .. && make && cp -r $(CWD)/$(DYNAMIC_DIR)/deps/hopscotch_map/include/* $(CWD)/$(INC_DIR)/
 	# Do the copy of the main file last so we can tell if this recipe failed and redo it.
 	# Otherwise we get dynamic.hpp without its deps
 	mkdir -p $(INC_DIR)/dynamic && cp -r $(CWD)/$(DYNAMIC_DIR)/include/dynamic/* $(INC_DIR)/dynamic/