present: ftrace PresentPixmap calls and flips

Singular successful PresentPixmap requests and the duration of each flip
are marked in the ftrace output.

Signed-off-by: Roman Gilg <subdiff@gmail.com>
3 jobs for ftraceMarker in 6 minutes and 34 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Docker Image
passed #338714
debian-testing

00:00:29

 
  Build And Test
passed #338715
autotools-build-and-test

00:06:04

passed #338716
meson-build-and-test

00:01:09