Add missing make files

src/timetabling/periodic/performance_rptts/Release/FILES_TO_CLEAN

+solve
\ No newline at end of file

src/timetabling/periodic/performance_rptts/Release/Makefile

+.PHONY: all dependencies clean
+
+SRC_FILES=$(shell find ../src -type f)
+CORE_LOCATION=../../../../core/cpp
+CORE_LIB=$(CORE_LOCATION)/lib/core.o
+
+all: dependencies solve
+
+dependencies:
+	make -C $(CORE_LOCATION) all
+
+solve: $(CORE_LIB) $(SRC_FILES)
+	g++ -std=c++11 -o solve ../src/main.cpp $(CORE_LIB)
+
+clean:
+	rm -f solve