entropy: OS split

Makefile

@@ -11,7 +11,7 @@ COM =\
 	components/$(OS)/cpu \
 	components/datetime\
 	components/disk\
-	components/entropy\
+	components/$(OS)/entropy \
 	components/hostname\
 	components/ip\
 	components/kernel_release\

components/Linux/entropy.c

@@ -1,8 +1,7 @@
 /* See LICENSE file for copyright and license details. */
-#if defined(__linux__)
 #include <stdio.h>
 
-#include "../util.h"
+#include "../../util.h"
 
 const char *
 entropy(void)
@@ -12,4 +11,3 @@ entropy(void)
 	return (pscanf("/proc/sys/kernel/random/entropy_avail", "%d", &num) == 1) ?
 	               bprintf("%d", num) : NULL;
 }
-#endif