Update gdb instructions
@aleb
Submitted by Alex Băluț Assigned to Alex Băluț @aleb
Description
http://developer.pitivi.org/Bug_reporting.html?gi-language=undefined#stack-traces-for-crashes mentions gdb python3 -ex 'run /app/bin/pitivi'
but that does not work because it has
BUILDDIR = '/run/build/pitivi/_flatpak_build'
A workaround is to use gdb python3 -ex 'run /.../pitivi/bin/pitivi'
.