8374044: Docs build fails: Cannot determine current path

Reviewed-by: dholmes
Backport-of: f88cbfb

Author: Dan Smith

make/Docs.gmk

@@ -104,7 +104,8 @@ JAVADOC_OPTIONS := -use -keywords -notimestamp \
 # development cycle.
 REFERENCE_OPTIONS := -XDignore.symbol.file=true -use -keywords -notimestamp \
     -serialwarn -encoding utf-8 -breakiterator -splitIndex --system none \
-    -html5 -javafx --expand-requires transitive
+    -html5 -javafx --expand-requires transitive \
+    -XDaccessInternalAPI
 
 # Should we add DRAFT stamps to the generated javadoc?
 ifeq ($(VERSION_IS_GA), true)