Fix recvfrom prototype.

http://pubs.opengroup.org/onlinepubs/9699919799/functions/recvfrom.html

Change-Id: Iba203c74045c88e53e28c2e0c8bc1f9ac63ce23e
diff --git a/libc/bionic/fortify.cpp b/libc/bionic/fortify.cpp
index 92db5d9..cf50664 100644
--- a/libc/bionic/fortify.cpp
+++ b/libc/bionic/fortify.cpp
@@ -217,8 +217,7 @@
 }
 
 ssize_t __recvfrom_chk(int socket, void* buf, size_t len, size_t buf_size,
-                       int flags, const sockaddr* src_addr,
-                       socklen_t* addrlen) {
+                       int flags, sockaddr* src_addr, socklen_t* addrlen) {
   __check_buffer_access("recvfrom", "write into", len, buf_size);
   return recvfrom(socket, buf, len, flags, src_addr, addrlen);
 }