perf trace beauty mmap: Add missing MADV_FREE

tools/perf/trace/beauty/mmap.c forgets to check MADV_FREE.
This patch fixes it.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1473850649-83389-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/trace/beauty/mmap.c

@@ -101,6 +101,7 @@ static size_t syscall_arg__scnprintf_madvise_behavior(char *bf, size_t size,
 	P_MADV_BHV(SEQUENTIAL);
 	P_MADV_BHV(WILLNEED);
 	P_MADV_BHV(DONTNEED);
+	P_MADV_BHV(FREE);
 	P_MADV_BHV(REMOVE);
 	P_MADV_BHV(DONTFORK);
 	P_MADV_BHV(DOFORK);