rootfs: print the path to files being deleted

Show the list of files being deleted.

Signed-off-by: Dan Mihai <dmihai@microsoft.com>

tools/osbuilder/rootfs-builder/rootfs.sh

@@ -839,6 +839,7 @@ delete_unnecessary_files()
 		find "${ROOTFS_DIR}" \
 			-type f \
 			\( -name "${u}.service" -o -name "${u}.socket" \) \
+			-exec echo "deleting {}" \; \
 			-exec rm -f {} \;
 	done
 
@@ -847,6 +848,7 @@ delete_unnecessary_files()
 		find "${ROOTFS_DIR}" \
 			-type f \
 			-name "${u}" \
+			-exec echo "deleting {}" \; \
 			-exec rm -f {} \;
 	done
 }