Add explain to compile libqi outside a qibuild worktree
Add explain to compile libqi outside a qibuild worktree

Change-Id: I997222236bc2087cabc1790970eb7e41795f6d02
Reviewed-on: http://gerrit.aldebaran.lan/72726
Reviewed-by: jmonnon <8898eaf233516e520f996a244ca8a12d20f948b1@aldebaran.com>
Tested-by: ncornu <13ba26b8f12d26c819f48749c65f2f7f5c1d13db@aldebaran.com>

aldebaran/libqi,aldebaran/libqi,aldebaran/libqi