Format the stub code and add stdlib.h to test

Author: jeongsoolee09

cpp/common/test/includes/standard-library/stdlib.h

@@ -7,7 +7,7 @@ void *calloc(size_t num, size_t size);
 void free(void *ptr);
 void *malloc(size_t size);
 void *realloc(void *ptr, size_t size);
-void* aligned_alloc(size_t, size_t);
+void *aligned_alloc(size_t, size_t);
 
 [[noreturn]] void _Exit(int status) noexcept;
 [[noreturn]] void abort(void) noexcept;

cpp/misra/test/rules/RULE-21-6-2/test.cpp

@@ -1,4 +1,5 @@
 #include <cstdlib>
+#include <stdlib.h>
 #include <memory>
 #include <memory_resource>
 #include <scoped_allocator>