Add "make all" building fuzz, benchmarks and all examples

Makefile

@@ -3,22 +3,27 @@ default:
 	$(CC) -DLIBUS_NO_SSL -flto -O3 -c -IuSockets/src uSockets/src/*.c uSockets/src/eventing/*.c
 	$(CXX) -DLIBUS_NO_SSL -DUWS_NO_ZLIB -flto -O3 -c -std=c++17 -Isrc -IuSockets/src examples/HelloWorld.cpp
 	$(CXX) -flto -O3 -s *.o -o HelloWorld
-	rm *.o
+	rm -f *.o
 
 # HelloWorldThreaded (non-SSL, non-Zlib compile)
 	$(CC) -DLIBUS_NO_SSL -flto -O3 -c -IuSockets/src uSockets/src/*.c uSockets/src/eventing/*.c
 	$(CXX) -DLIBUS_NO_SSL -DUWS_NO_ZLIB -flto -O3 -c -std=c++17 -Isrc -IuSockets/src examples/HelloWorldThreaded.cpp
 	$(CXX) -pthread -flto -O3 -s *.o -o HelloWorldThreaded
-	rm *.o
+	rm -f *.o
 
 # EchoServer (non-SSL, non-Zlib compile)
 	$(CC) -DLIBUS_NO_SSL -flto -O3 -c -IuSockets/src uSockets/src/*.c uSockets/src/eventing/*.c
 	$(CXX) -DLIBUS_NO_SSL -DUWS_NO_ZLIB -flto -O3 -c -std=c++17 -Isrc -IuSockets/src examples/EchoServer.cpp
 	$(CXX) -flto -O3 -s *.o -o EchoServer
-	rm *.o
+	rm -f *.o
 
 # EchoServerThreaded (non-SSL, non-Zlib compile)
 	$(CC) -DLIBUS_NO_SSL -flto -O3 -c -IuSockets/src uSockets/src/*.c uSockets/src/eventing/*.c
 	$(CXX) -DLIBUS_NO_SSL -DUWS_NO_ZLIB -flto -O3 -c -std=c++17 -Isrc -IuSockets/src examples/EchoServerThreaded.cpp
 	$(CXX) -pthread -flto -O3 -s *.o -o EchoServerThreaded
-	rm *.o
+	rm -f *.o
+
+all:
+	make default && rm -f *.o
+	cd fuzzing && make && rm -f *.o
+	cd benchmarks && make && rm -f *.o