Review for JDK-8055497: [infra] build failure when building bootcycle image

[Mandy Chung]

Erik,

I have a small patch fixing the missing dependency for building
resources.jar.  Naoto has reviewed and verified this patch.  I'll
go ahead and push it now.  You can adjust it later.   We should
also check similar dependency is needed by other targets.

Mandy

$ diff --git a/make/Main.gmk b/make/Main.gmk
--- a/make/Main.gmk
+++ b/make/Main.gmk
@@ -234,7 +234,8 @@
  	+($(CD) $(NASHORN_TOPDIR)/make && $(MAKE) $(MAKE_ARGS) -f BuildNashorn.gmk all)
  
  # Creates the jar files (rt.jar resources.jar etc)
-main-jars:
+# this depends on all modules built
+main-jars: exploded-image
  	+($(CD) $(JDK_TOPDIR)/make && $(MAKE) $(MAKE_ARGS) -f CreateJars.gmk)
  
  # Creates the images (j2sdk-image j2re-image etc)