Update echo

apps/base/echo/echo.c

@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+	for (int i = 1; i < argc; i++)
+	{
+		printf("%s ", argv[i]);
+	}
+	printf("\n");
+	return 0;
+}