task-base: follow OE-Core the rename to packagegroup-base

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

diff --git a/meta-fsl-arm/recipes-core/tasks/task-base.bbappend b/meta-fsl-arm/recipes-core/packagegroup/packagegroup-base.bbappend
similarity index 100%
rename from meta-fsl-arm/recipes-core/tasks/task-base.bbappend
rename to meta-fsl-arm/recipes-core/packagegroup/packagegroup-base.bbappend