ihk_os_getrusage(): Compile LWK-specific results in mcctrl

1. User asks mcctrl for the result via ihk_os_getrusage() with passing void *
2. mcctrl compiles the results and passes them to the user
3. User interprets it by using the type defined in the LWK-specific header

lib/include/ihk/mm.h

@@ -227,6 +227,7 @@ int ihk_set_kmsg(unsigned long addr, unsigned long size);
 char *ihk_get_kargs();
 
 int ihk_set_monitor(unsigned long addr, unsigned long size);
+int ihk_set_rusage(unsigned long addr, unsigned long size);
 int ihk_set_nmi_mode_addr(unsigned long addr);
 
 extern void (*__tlb_flush_handler)(int vector);