8214045: Missing explicit dependencies of build-microbenchmark cause intermittent build failure

Reviewed-by: ihse, dholmes
diff --git a/make/Main.gmk b/make/Main.gmk
index 8745996..f18b1f9 100644
--- a/make/Main.gmk
+++ b/make/Main.gmk
@@ -793,7 +793,7 @@
 
   jrtfs-jar: interim-langtools
 
-  build-microbenchmark: interim-langtools jdk.unsupported java.management
+  build-microbenchmark: interim-langtools exploded-image
 
   ifeq ($(ENABLE_GENERATE_CLASSLIST), true)
     ifeq ($(CREATE_BUILDJDK), true)