examples: add img-capture example

This one can be useful in scripts, e.g. for building fingerprint
dataset.
6 jobs for examples-img-capture in 3 minutes and 15 seconds
latest
Status Name Job ID Coverage
  Check Source
passed test_indent #3088815

00:01:36

 
  Build
passed build #3088816

00:00:31

 
  Test
passed test #3088817

00:01:06

59.0%
passed test_scan_build #3088819

00:00:51

passed test_valgrind #3088818

00:01:07

 
  Flatpak
manual flatpak-manual master #3088820
allowed to fail manual