build: Honor BUILD_GRILO_PLS conditional for example code
build: Honor BUILD_GRILO_PLS conditional for example code

This was breaking the Continuous build.

jasuarez/grilo,grilofw/grilo,jasuarez/grilo,MathieuDuponchelle/grilo,jasuarez/grilo,GNOME/grilo,grilofw/grilo,GNOME/grilo,MathieuDuponchelle/grilo,MathieuDuponchelle/grilo,grilofw/grilo