Added time RTC library

kernel/libc/Makefile

@@ -1,4 +1,4 @@
-OBJS = stdio.o string.o assert.o
+OBJS = stdio.o string.o assert.o time.o
 
 CC = i686-elf-gcc # cross-compiler
 CFLAGS = -m32 -fno-stack-protector -ffreestanding -Wall -Wextra -Werror -g -c
@@ -7,4 +7,4 @@ CFLAGS = -m32 -fno-stack-protector -ffreestanding -Wall -Wextra -Werror -g -c
 all:${OBJS}
 
 %.o: %.c
-	$(CC) $(CFLAGS) $< -o $@
+	$(CC) $(CFLAGS) $< -o $@