wrong prototype definition of libc_file_init() generates warnings in static code analysis

The definition of libc_file_init() in Includes/API/libc_file_support.h is incorrect. When using the file in a project, static code analysis tool PCLint complains:

In file included from ..\Sources\config.c:38:0:
..\..\Components\rcX_V2.1\Includes\API/libc_file_support.h:37:1: warning: function declaration isn't a prototype

To fix this, the definition in libc_file_support.h shall be changed to

void libc_file_init(void);