python: limit tooltip string length to 16384

Pydot limits the maximum line length to this value

JIRA:https://gem5.atlassian.net/browse/GEM5-1200

Change-Id: I0e6423b79f014695496dad279322304ae10a3978
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/61009
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
1 file changed