build: rename 'doc' directory to 'docs' for upload

to match nodejs.org directory name

PR-URL: #2623
Reviewed-By: jbergstroem - Johan Bergström <bugs@bergstroem.nu>

Makefile

@@ -382,8 +382,8 @@ endif
 
 doc-upload: tar
 	ssh $(STAGINGSERVER) "mkdir -p staging/$(DISTTYPEDIR)/$(FULLVERSION)"
-	scp -r out/doc/ $(STAGINGSERVER):staging/$(DISTTYPEDIR)/$(FULLVERSION)/
-	ssh $(STAGINGSERVER) "touch staging/$(DISTTYPEDIR)/$(FULLVERSION)/doc.done"
+	scp -r out/doc/ $(STAGINGSERVER):staging/$(DISTTYPEDIR)/$(FULLVERSION)/docs/
+	ssh $(STAGINGSERVER) "touch staging/$(DISTTYPEDIR)/$(FULLVERSION)/docs.done"
 
 $(TARBALL)-headers: config.gypi release-only
 	$(PYTHON) ./configure \