gdbserver: adjust init_target_desc call in tic6x_read_description

I spotted this call missing an argument.

For context, init_target_desc gained this osabi parameter in this
commit:

    Author:     Andrew Burgess <aburgess@redhat.com>
    AuthorDate: Fri Oct 4 19:30:04 2024 +0100
    Commit:     Andrew Burgess <aburgess@redhat.com>
    CommitDate: Tue Nov 12 12:51:36 2024 +0000

        gdbserver: pass osabi to GDB in more target descriptions

This bug was present in GDB 16.  I wonder if anybody uses this today.

Change-Id: Id5483be3efa0ca9d238d59af8abae94e8bdbd57c
Approved-By: Tom Tromey <tom@tromey.com>
diff --git a/gdbserver/linux-tic6x-low.cc b/gdbserver/linux-tic6x-low.cc
index b81863b..68fee8d 100644
--- a/gdbserver/linux-tic6x-low.cc
+++ b/gdbserver/linux-tic6x-low.cc
@@ -228,7 +228,7 @@
     {
       *tdesc = tic6x_create_target_description (feature);
       static const char *expedite_regs[] = { "A15", "PC", NULL };
-      init_target_desc (*tdesc, expedite_regs);
+      init_target_desc (*tdesc, expedite_regs, GDB_OSABI_LINUX);
     }
 
   return *tdesc;