Make the source tree sparse clean.

With this commit, the tree compiles clean with sparse commit 87f4a7fda3d
"Teach 'already_tokenized()' to use the stream name hash table" with patch
"evaluate: Allow sizeof(_Bool) to succeed" available at
http://permalink.gmane.org/gmane.comp.parsers.sparse/2461 applied, as long
as the "include/sparse" directory is included for use by sparse (only),
e.g.:
     make CC="CHECK='sparse -I../include/sparse' cgcc"

include/sparse/sys/socket.h

@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2011 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __CHECKER__
+#error "Use this header only with sparse.  It is not a correct implementation."
+#endif
+
+#ifndef __SYS_SOCKET_SPARSE
+#define __SYS_SOCKET_SPARSE 1
+
+#include "openvswitch/types.h"
+#include <sys/uio.h>
+
+typedef unsigned short int sa_family_t;
+typedef __socklen_t socklen_t;
+
+struct sockaddr {
+    sa_family_t sa_family;
+    char sa_data[64];
+};
+
+struct sockaddr_storage {
+    sa_family_t ss_family;
+    char sa_data[64];
+};
+
+struct msghdr {
+    void *msg_name;
+    socklen_t      msg_namelen;
+    struct iovec  *msg_iov;
+    int            msg_iovlen;
+    void          *msg_control;
+    socklen_t      msg_controllen;
+    int            msg_flags;
+};
+
+enum {
+    SOCK_DGRAM,
+    SOCK_RAW,
+    SOCK_SEQPACKET,
+    SOCK_STREAM
+};
+
+enum {
+    SOL_SOCKET
+};
+
+enum {
+    SO_ACCEPTCONN,
+    SO_BROADCAST,
+    SO_DEBUG,
+    SO_DONTROUTE,
+    SO_ERROR,
+    SO_KEEPALIVE,
+    SO_LINGER,
+    SO_OOBINLINE,
+    SO_RCVBUF,
+    SO_RCVLOWAT,
+    SO_RCVTIMEO,
+    SO_REUSEADDR,
+    SO_SNDBUF,
+    SO_SNDLOWAT,
+    SO_SNDTIMEO,
+    SO_TYPE
+};
+
+enum {
+    MSG_CTRUNC,
+    MSG_DONTROUTE,
+    MSG_EOR,
+    MSG_OOB,
+    MSG_NOSIGNAL,
+    MSG_PEEK,
+    MSG_TRUNC,
+    MSG_WAITALL,
+    MSG_DONTWAIT
+};
+
+enum {
+    AF_UNSPEC,
+    PF_UNSPEC = AF_UNSPEC,
+    AF_INET,
+    PF_INET = AF_INET,
+    AF_INET6,
+    PF_INET6 = AF_INET6,
+    AF_UNIX,
+    PF_UNIX = AF_UNIX,
+    AF_NETLINK,
+    PF_NETLINK = AF_NETLINK,
+    AF_PACKET,
+    PF_PACKET = AF_PACKET
+};
+
+enum {
+    SHUT_RD,
+    SHUT_RDWR,
+    SHUT_WR
+};
+
+int accept(int, struct sockaddr *, socklen_t *);
+int bind(int, const struct sockaddr *, socklen_t);
+int connect(int, const struct sockaddr *, socklen_t);
+int getpeername(int, struct sockaddr *, socklen_t *);
+int getsockname(int, struct sockaddr *, socklen_t *);
+int getsockopt(int, int, int, void *, socklen_t *);
+int listen(int, int);
+ssize_t recv(int, void *, size_t, int);
+ssize_t recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
+ssize_t recvmsg(int, struct msghdr *, int);
+ssize_t send(int, const void *, size_t, int);
+ssize_t sendmsg(int, const struct msghdr *, int);
+ssize_t sendto(int, const void *, size_t, int, const struct sockaddr *,
+               socklen_t);
+int setsockopt(int, int, int, const void *, socklen_t);
+int shutdown(int, int);
+int sockatmark(int);
+int socket(int, int, int);
+int socketpair(int, int, int, int[2]);
+
+#endif /* <sys/socket.h> for sparse */