[droid] Support building for android

These are the changes necessary to build for android. Working status is yet
untested.

include/libnfs.h

@@ -18,6 +18,9 @@
  * This is the highlevel interface to access NFS resources using a posix-like interface
  */
 #include <stdint.h>
+#if defined(ANDROID)
+#include <sys/time.h>
+#endif
 
 struct nfs_context;
 struct rpc_context;

lib/libnfs-sync.c

@@ -23,7 +23,13 @@
 #else
 #include <strings.h>
 #include <unistd.h>
+#ifndef ANDROID
 #include <sys/statvfs.h>
+#else
+#include <netinet/in.h>
+#include <sys/vfs.h>
+#define statvfs statfs
+#endif
 #include <poll.h>
 #include <sys/ioctl.h>
 #include <netdb.h>

lib/libnfs.c

@@ -22,7 +22,12 @@
 #define DllExport
 #else
 #include <strings.h>
+#ifndef ANDROID
 #include <sys/statvfs.h>
+#else
+#include <sys/vfs.h>
+#define statvfs statfs
+#endif
 #include <utime.h>
 #include <unistd.h>
 #endif/*WIN32*/
@@ -2414,10 +2419,12 @@ static void nfs_statvfs_1_cb(struct rpc_context *rpc, int status, void *command_
 	svfs.f_bavail  = res->FSSTAT3res_u.resok.abytes/4096;
 	svfs.f_files   = res->FSSTAT3res_u.resok.tfiles;
 	svfs.f_ffree   = res->FSSTAT3res_u.resok.ffiles;
+#if !defined(ANDROID)
 	svfs.f_favail  = res->FSSTAT3res_u.resok.afiles;
 	svfs.f_fsid    = 0;
 	svfs.f_flag    = 0;
 	svfs.f_namemax = 256;
+#endif
 
 	data->cb(0, nfs, &svfs, data->private_data);
 	free_nfs_cb_data(data);

nfs/libnfs-raw-nfs.h

@@ -18,6 +18,11 @@ extern "C" {
 #define NFS3_CREATEVERFSIZE 8
 #define NFS3_COOKIEVERFSIZE 8
 
+#if defined(ANDROID)
+typedef long long int quad_t;
+typedef long long unsigned u_quad_t;
+#endif
+
 typedef char cookieverf3[NFS3_COOKIEVERFSIZE];
 
 typedef u_quad_t uint64;

nlm/libnfs-raw-nlm.h

@@ -13,6 +13,10 @@
 extern "C" {
 #endif
 
+#if defined(ANDROID)
+typedef long long int quad_t;
+typedef long long unsigned u_quad_t;
+#endif
 
 struct nlm_fh4 {
 	struct {