Fix clang time_t printf format warning to make test compile.

Index: conformance/interfaces/mmap/13-1.c
--- conformance/interfaces/mmap/13-1.c.orig
+++ conformance/interfaces/mmap/13-1.c
@@ -55,7 +55,7 @@ int main()
   size = total_size;
 
   struct stat stat_buff, stat_buff2;
-  time_t atime1, atime2, atime3;
+  long long atime1, atime2, atime3;
    
   char *ch;
  
@@ -73,7 +73,7 @@ int main()
   
   data = (char *) malloc(total_size); 
   memset(data, 'a', total_size);
-  printf("Time before write(): %ld\n", time(NULL));
+  printf("Time before write(): %lld\n", (long long)time(NULL));
   if (write(fd, data, total_size) != total_size)
   {
     printf(TNAME "Error at write(): %s\n", 
@@ -97,7 +97,7 @@ int main()
   
   flag = MAP_SHARED;
   prot = PROT_READ | PROT_WRITE;
-  printf("Time before mmap(): %ld\n", time(NULL));
+  printf("Time before mmap(): %lld\n", (long long)time(NULL));
   pa = mmap(addr, size, prot, flag, fd, off);
   if (pa == MAP_FAILED)
   {
@@ -126,7 +126,7 @@ int main()
   ch = pa;
   *ch = 'b';
   
-  printf("Time before munmap(): %ld\n", time(NULL));
+  printf("Time before munmap(): %lld\n", (long long)time(NULL));
   munmap(pa, size);
   
   /* FIXME: Update the in-core meta data to the disk */
@@ -142,8 +142,8 @@ int main()
   /* atime3: write to memory */
   atime3 = stat_buff.st_atime;
   
-  printf("atime1: %d, atime2: %d, atime3: %d\n",
-         (int)atime1, (int)atime2, (int)atime3);
+  printf("atime1: %lld, atime2: %lld, atime3: %lld\n",
+         atime1, atime2, atime3);
   if (atime1 != atime3 || 
   	  atime1 != atime2 )
   {
