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 9 minutes (queued for 32 seconds)
latest
Status Job ID Name Coverage
  Docker Image
passed #497553
debian-testing

00:00:37

 
  Build And Test
passed #497554
autotools-build-and-test

00:08:23

passed #497555
meson-build-and-test

00:03:05