Stub shell

apps/system/sh/sh.c

@@ -0,0 +1,9 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <aux.h>
+
+int main(int argc, char *argv[], char *envp[])
+{
+    printf("Hello, world!\n");
+    return 0;
+}