libc: unistd: lib_getrlimit: set cur/max value for RLIMIT_NOFILE to "OPEN_MAX".

Signed-off-by: Takeyoshi Kikuchi <kikuchi@centurysys.co.jp>

libs/libc/unistd/lib_getrlimit.c

@@ -60,8 +60,8 @@ int getrlimit(int resource, FAR struct rlimit *rlp)
     {
       case RLIMIT_NOFILE:
         {
-          rlp->rlim_cur = 128;
-          rlp->rlim_max = INT_MAX; /* dummy */
+          rlp->rlim_cur = OPEN_MAX;
+          rlp->rlim_max = OPEN_MAX;
         }
         break;