perl: removes useless files in target tree

$(TARGET_DIR)/usr/lib/perl5/$(PERL_VERSION)/$(PERL_ARCHNAME)/CORE contains include files.
*.bs & .packlist files come with perl or perl/cpan packages.

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Makefile

@@ -554,6 +554,9 @@ ifeq ($(BR2_PACKAGE_PYTHON_PYC_ONLY)$(BR2_PACKAGE_PYTHON3_PYC_ONLY),y)
 	find $(TARGET_DIR)/usr/lib/ -name '*.py' -print0 | xargs -0 rm -f
 endif
 	rm -rf $(TARGET_DIR)/usr/lib/luarocks
+	rm -rf $(TARGET_DIR)/usr/lib/perl5/$(PERL_VERSION)/$(PERL_ARCHNAME)/CORE
+	find $(TARGET_DIR)/usr/lib/perl5/ -name '*.bs' -print0 | xargs -0 rm -f
+	find $(TARGET_DIR)/usr/lib/perl5/ -name '.packlist' -print0 | xargs -0 rm -f
 	$(STRIP_FIND_CMD) | xargs $(STRIPCMD) 2>/dev/null || true
 	if test -d $(TARGET_DIR)/lib/modules; then \
 		find $(TARGET_DIR)/lib/modules -type f -name '*.ko' | \