debian/patches: Add 0001_fix-pkexec-calls-in-desktop-launcher.patch. In...

debian/patches: Add 0001_fix-pkexec-calls-in-desktop-launcher.patch. In mate-desktop-item.c: Add a child watch if "do not reap child" flag is set. This avoids double forking with desktop files that have "exec pkexec ..." inside. (Closes: #781246).