Force an update of the go.mod files before building official release.

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
diff --git a/Makefile b/Makefile
index e148633..939b5a2 100644
--- a/Makefile
+++ b/Makefile
@@ -31,8 +31,9 @@
 
 distclean: clean
 	$(DISTCLEAN)
-	@echo "CONFIRM Go package cap has right version dependency on psx:"
-	grep -F "require kernel.org/pub/linux/libs/security/libcap/psx v$(GOMAJOR).$(VERSION).$(MINOR)" cap/go.mod
+	@echo "CONFIRM Go package cap has right version dependency on cap/psx:"
+	for x in $$(find . -name go.mod); do grep -F "require kernel.org/pub/linux/libs/security/libcap" $$x || continue ; grep -F "v$(GOMAJOR).$(VERSION).$(MINOR)" $$x && continue ; echo "$$x is not updated to v$(GOMAJOR).$(VERSION).$(MINOR)" ; exit 1 ; done
+	@echo "ALL go.mod files updated"
 
 release: distclean
 	cd .. && ln -s libcap libcap-$(VERSION).$(MINOR) && tar cvf libcap-$(VERSION).$(MINOR).tar --exclude patches libcap-$(VERSION).$(MINOR)/* && rm libcap-$(VERSION).$(MINOR)