[NaCl Docs] Add a new doc build configuration: devsite-staging.

native_client_sdk/src/doc/Makefile

Index: native_client_sdk/src/doc/Makefile
diff --git a/native_client_sdk/src/doc/Makefile b/native_client_sdk/src/doc/Makefile
index 2fc4e0fe2798c3a6af278caa846d8f88b63d05ec..c3fece04d5ce7d14c6d09a48176b1f8eaa18b089 100644
--- a/native_client_sdk/src/doc/Makefile
+++ b/native_client_sdk/src/doc/Makefile
@@ -183,9 +183,18 @@ pseudoxml:
 
 devsite-prod:
 	$(SPHINXBUILD) -b devsite -D devsite_production_mode=1 $(ALLSPHINXOPTS) $(BUILDDIR)/devsite-prod
+	rm -f $(BUILDDIR)/devsite-prod/objects.inv
+	rm -f $(BUILDDIR)/devsite-prod/rest-devsite-examples.html
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/devsite-prod."
 
+devsite-staging:
+	$(SPHINXBUILD) -b devsite -D devsite_foldername=$(USER) -D devsite_production_mode=1 $(ALLSPHINXOPTS) $(BUILDDIR)/devsite-staging
+	rm -f $(BUILDDIR)/devsite-staging/objects.inv
+	rm -f $(BUILDDIR)/devsite-staging/rest-devsite-examples.html
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/devsite-staging."
+
 devsite:
 	$(SPHINXBUILD) -b devsite -D devsite_production_mode=0 $(ALLSPHINXOPTS) $(BUILDDIR)/devsite
 	@echo