include mmap header if detected by configure

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@93138 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/file.h

@@ -29,6 +29,10 @@
 #include <fcntl.h>
 #endif
 
+#ifdef HAVE_MMAP
+#include <sys/mman.h>
+#endif
+
 #if defined(__cplusplus) || defined(c_plusplus)
 extern "C" {
 #endif