gdb/hurd: pass memory_tagged as false to find_memory_region_ftype

gdb/hurd: pass memory_tagged as false to find_memory_region_ftype

I tried building GDB on GNU/Hurd, and ran into this error:

  CXX    gnu-nat.o
gnu-nat.c: In member function ‘virtual int gnu_nat_target::find_memory_regions(find_memory_region_ftype, void*)’:
gnu-nat.c:2620:21: error: too few arguments to function
 2620 |             (*func) (last_region_address,
      |             ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
 2621 |                      last_region_end - last_region_address,
      |                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2622 |                      last_protection & VM_PROT_READ,
      |                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2623 |                      last_protection & VM_PROT_WRITE,
      |                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2624 |                      last_protection & VM_PROT_EXECUTE,
      |                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2625 |                      1, /* MODIFIED is unknown, pass it as true.  */
      |                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2626 |                      data);
      |                      ~~~~~
gnu-nat.c:2635:13: error: too few arguments to function
 2635 |     (*func) (last_region_address, last_region_end - last_region_address,
      |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2636 |              last_protection & VM_PROT_READ,
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2637 |              last_protection & VM_PROT_WRITE,
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2638 |              last_protection & VM_PROT_EXECUTE,
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2639 |              1, /* MODIFIED is unknown, pass it as true.  */
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2640 |              data);
      |              ~~~~~
make[2]: *** [Makefile:1926: gnu-nat.o] Error 1

This is because in this commit:

  commit 68cffbbd4406b4efe1aa6e18460b1d7ca02549f1
  Date:   Thu Mar 31 11:42:35 2022 +0100

      [AArch64] MTE corefile support

Added a new argument to find_memory_region_ftype, but did not pass it to
the function in gnu-nat.c.  Fix this by passing memory_tagged as false.

As Luis pointed out, similar bugs may also appear on FreeBSD and NetBSD,
and I have reproduced them on both systems.  This patch fixes them
incidentally.

Tested by rebuilding on GNU/Hurd, FreeBSD/amd64 and NetBSD/amd64.