Fix some warnings for implicit declaration of functions

libelfloader/source/elfloader.c

@@ -1,6 +1,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <sys/mman.h>
+
 #include <elfloader.h>
 
 /* Defines */

liborbisAudio/source/orbisAudio.c

@@ -10,6 +10,7 @@
 #include <kernel.h>
 #include <audioout.h>
 #include <debugnet.h>
+#include <unistd.h>
 #include "orbisAudio.h"
 
 

liborbisKeyboard/source/orbisKeyboard.c

@@ -9,6 +9,7 @@
 #include <stdbool.h>
 #include <userservice.h>
 #include <sysmodule.h>
+#include <unistd.h>
 
 #include "orbisKeyboard.h"
 #include "kb.h"

libps4link/source/jailbreak.c

@@ -1,6 +1,8 @@
 #include <stdint.h>
 #include <kernel.h>
 #include <sys/mman.h>
+#include <debugnet.h>
+#include <unistd.h>
 
 #define	CTL_KERN	1	/* "high kernel": proc, limits */
 #define	KERN_PROC	14	/* struct: process entries */