infra: don't be verbose when calling the instrumentation steps

Commit 509db3b88a added calls to (parts of) the instrumentation steps.
However, those calls are echoed, unlike the other places where we call
them (in the package infra).

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Acked-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>

Makefile

@@ -807,12 +807,12 @@ endif # merged /usr
 # AFTER ALL FILE-CHANGING ACTIONS:
 # Update timestamps in internal file list to fix attribution of files
 # to packages on subsequent builds
-	$(call step_pkg_size_file_list,$(TARGET_DIR))
-	$(call step_pkg_size_finalize)
-	$(call step_pkg_size_file_list,$(STAGING_DIR),-staging)
-	$(call step_pkg_size_finalize,-staging)
-	$(call step_pkg_size_file_list,$(HOST_DIR),-host)
-	$(call step_pkg_size_finalize,-host)
+	@$(call step_pkg_size_file_list,$(TARGET_DIR))
+	@$(call step_pkg_size_finalize)
+	@$(call step_pkg_size_file_list,$(STAGING_DIR),-staging)
+	@$(call step_pkg_size_finalize,-staging)
+	@$(call step_pkg_size_file_list,$(HOST_DIR),-host)
+	@$(call step_pkg_size_finalize,-host)
 
 .PHONY: target-post-image
 target-post-image: $(TARGETS_ROOTFS) target-finalize staging-finalize