core: Remove incorrect usage of attribute_malloc.

GCC documentation states that when __attribute__((malloc)) is used it
should not return storage which contains any valid pointers.  It
specifically mentions that realloc functions should not have the malloc
attribute, but this also means that complex initializers which could
contain initialized pointers should not use this attribute.

Change-Id: If507f33ffb3ca3b83b702196eb0e8215d27fc7d2