Patch porting gcc v2 (#124)

* 更改编译器的Include路径，使得include时不需要加`<libc/src/include/>`前缀

* 修改include路径

Co-authored-by: longjin <longjin@RinGoTek.cn>

user/apps/shell/cmd.c

@@ -1,17 +1,17 @@
 #include "cmd.h"
 #include "cmd_help.h"
 #include "cmd_test.h"
-#include <libc/src/dirent.h>
-#include <libc/src/errno.h>
-#include <libc/src/fcntl.h>
-#include <libc/src/include/signal.h>
-#include <libc/src/stddef.h>
-#include <libc/src/stdio.h>
-#include <libc/src/stdlib.h>
-#include <libc/src/string.h>
-#include <libc/src/sys/stat.h>
-#include <libc/src/sys/wait.h>
-#include <libc/src/unistd.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <unistd.h>
 #include <libsystem/syscall.h>
 
 // 当前工作目录（在main_loop中初始化）

user/apps/shell/cmd_help.c

@@ -1,6 +1,7 @@
 #include "cmd_help.h"
-#include <libc/src/stdio.h>
-#include <libc/src/stdlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+
 struct help_table_item_t
 {
     void (*func)();

user/apps/shell/cmd_test.c

@@ -1,8 +1,8 @@
 #include "cmd_test.h"
-#include <libc/src/stdio.h>
-#include <libc/src/stdlib.h>
-#include <libc/src/string.h>
-#include <libc/src/unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 int shell_pipe_test(int argc, char **argv)
 {

user/apps/shell/shell.c

@@ -1,13 +1,13 @@
 #include "cmd.h"
 #include <libKeyboard/keyboard.h>
-#include <libc/src/fcntl.h>
-#include <libc/src/printf.h>
-#include <libc/src/stddef.h>
-#include <libc/src/stdio.h>
-#include <libc/src/stdlib.h>
-#include <libc/src/string.h>
-#include <libc/src/sys/stat.h>
-#include <libc/src/unistd.h>
+#include <fcntl.h>
+#include <printf.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 #define pause_cpu() asm volatile("pause\n\t");
 #define MEM_HISTORY 1024