XML: Add multi-analyses views

XML: Add multi-analyses views

This patch adds a new attribute to time graph view entry to be able to
use the state system from another analyses to populate some entries.

It also adds more regex support where path can contain place holders
like $1 to be replaced by any wildcard previously specified.

Change-Id: I13de7d2a4af091f4090ddc5ee61634739571c4d7
Signed-off-by: Geneviève Bastien <gbastien+lttng@versatic.net>
Reviewed-on: https://git.eclipse.org/r/95379
Reviewed-by: Hudson CI
Reviewed-by: Jean-Christian Kouame <jean-christian.kouame@ericsson.com>
Tested-by: Jean-Christian Kouame <jean-christian.kouame@ericsson.com>