Fix macOS build (#146)

* Fix macOS build
* Fix *BSD build
* Add missing *BSD include

dedicated/filesystem.cpp

@@ -13,7 +13,11 @@
 #include <stdlib.h>
 #include "interface.h"
 #include <string.h>
+#ifdef OSX
+#include <malloc/malloc.h>
+#else
 #include <malloc.h>
+#endif
 #include "tier1/strtools.h"
 #include "tier0/icommandline.h"
 #include "tier0/dbg.h"

dedicated/sys_linux.cpp

@@ -12,7 +12,11 @@
 #include <stdarg.h>
 #include <sys/types.h>
 #include <sys/time.h>
+#ifdef OSX
+#include <malloc/malloc.h>
+#else
 #include <malloc.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <dlfcn.h>