build when creating pdf

Author: nuest

Makefile

@@ -11,7 +11,7 @@ VCS_REF := $(shell git rev-parse --short HEAD)
 CURRENT_DATE := $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
 FILE_NAME_PDF := $(shell echo o2r-architecture-${VCS_REF}.pdf)
 
-pdf:
+pdf: build
 # update version in cover page, if not already done
 sed -i 's/@@VERSION@@/${VCS_REF}/g' site/index.html
 sed -i 's/@@TIMESTAMP@@/${CURRENT_DATE}/g' site/index.html