xenctx: Add command line option -t (--tag-stack-dump)

xenctx: Add command line option -t (--tag-stack-dump)

If specified, add stack address to dump.

This is not the default because the result exceeds 80 characters per line.

Here is an example:

Stack:
ffffffff803ddf90: ffffffff80048d19 0000000000200800 ffffffff803e7801 0000000000086800
ffffffff803ddfb0: 0000000000000000 ffffffff80430720 ffffffff803e722f 80008e000010019c
ffffffff803ddfd0: 00000000ffffffff 0000000000000000 0000000000000000 0000000000200000
ffffffff803ddff0: 0000000000000000 0000000000000000

Signed-off-by: Don Slutz <Don@CloudSwitch.com>
Reviewed-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>