New jobs need to re-emit all state. Typically, this is achieved
by resetting all dirty state flags when we start a new job, but
for index buffers we were not using a dirty bit because we always
emit them immediately. This patch adds the bit and only tries
to skip index buffer state if the bit is not dirty, which will
ensure that we will always emit it for new jobs.
This fixes a regression in the shadowmapping demo from Sascha Willems
introduced with "v3dv: try harder to skip emission of redundant state".
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
Iago Toral Quiroga
1d6edcc3e8