[fusl] Remove LFS64 macro

fusl/src/misc/getrlimit.c

 #include <sys/resource.h>
 #include <errno.h>
 #include "syscall.h"
 #include "libc.h"
 
 #define FIX(x)                        \
   do {                                \
     if ((x) >= SYSCALL_RLIM_INFINITY) \
       (x) = RLIM_INFINITY;            \
   } while (0)
 
 int getrlimit(int resource, struct rlimit* rlim) {
   unsigned long k_rlim[2];
   int ret = syscall(SYS_prlimit64, 0, resource, 0, rlim);
   if (!ret) {
     FIX(rlim->rlim_cur);
     FIX(rlim->rlim_max);
   }
   if (!ret || errno != ENOSYS)
     return ret;
   if (syscall(SYS_getrlimit, resource, k_rlim) < 0)
     return -1;
   rlim->rlim_cur = k_rlim[0] == -1UL ? RLIM_INFINITY : k_rlim[0];
   rlim->rlim_max = k_rlim[1] == -1UL ? RLIM_INFINITY : k_rlim[1];
   FIX(rlim->rlim_cur);
   FIX(rlim->rlim_max);
   return 0;
 }
-
-LFS64(getrlimit);