gdbsx: Add Emacs local variables to source files.

These 2 files are changed in this patch set.  So add the allowed
"Emacs local variables" from CODING_STYLE.

Signed-off-by: Don Slutz <dslutz@verizon.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/debugger/gdbsx/xg/xg_main.c

@@ -821,3 +821,11 @@ xg_write_mem(uint64_t guestva, char *frombuf, int buflen, uint64_t pgd3val)
     return iop->remain;
 }
 
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */