build: only require docs 'Added' fixes for release

Author: rvagg

Makefile

@@ -662,8 +662,7 @@ PACKAGEMAKER ?= /Developer/Applications/Utilities/PackageMaker.app/Contents/MacO
 PKGDIR=out/dist-osx
 
 release-only:
-	@if [ "$(DISTTYPE)" != "nightly" ] && [ "$(DISTTYPE)" != "next-nightly" ] && \
-		`grep -q REPLACEME doc/api/*.md`; then \
+	@if [ "$(DISTTYPE)" == "release" ] && `grep -q REPLACEME doc/api/*.md`; then \
 		echo 'Please update REPLACEME in Added: tags in doc/api/*.md (See doc/releases.md)' ; \
 		exit 1 ; \
 	fi