linux-user: elfload: s/min_mmap_addr/mmap_min_addr/

As-is the error message can cause some confusion as the mentioned sysctl
attribute name is wrong:

https://www.kernel.org/doc/html/latest/admin-guide/sysctl/vm.html#mmap-min-addr

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

linux-user/elfload.c

@@ -2798,7 +2798,7 @@ static void pgb_reserved_va(const char *image_name, abi_ulong guest_loaddr,
     if (addr == MAP_FAILED || addr != test) {
         error_report("Unable to reserve 0x%lx bytes of virtual address "
                      "space at %p (%s) for use as guest address space (check your "
-                     "virtual memory ulimit setting, min_mmap_addr or reserve less "
+                     "virtual memory ulimit setting, mmap_min_addr or reserve less "
                      "using -R option)", reserved_va + 1, test, strerror(errno));
         exit(EXIT_FAILURE);
     }