RFR: JDK-8138636: bootcycle-images build fails

[Erik Joelsson]

Please review this small fix for the bootcycle-build, which broke when I 
removed the interim-corba build.

In JDK 9 then we have moved module java.corba to the extension class 
loader. So if code on the boot class path has a reference to types in 
the java.corba module then it will fail with NoClassDefFoundError. This 
currently happens since we add the interim rmic classes to the 
bootclasspath, but no longer the interim-corba classes.

The fix is to not set -Xbootclasspath/p at all. It was never needed and 
I just did it that way originally by trying to match existing patterns. 
I have verified that the bug which prompted the introduction of 
interim-rmic is still fixed when running without -Xbootclasspath/p.

Bug: https://bugs.openjdk.java.net/browse/JDK-8138636

Patch inline:
diff -r 14faed4d6a50 make/rmic/RmicCommon.gmk
--- a/make/rmic/RmicCommon.gmk
+++ b/make/rmic/RmicCommon.gmk
@@ -33,7 +33,7 @@

  BTRMIC_CP := $(call PathList, \
      $(BUILDTOOLS_OUTPUTDIR)/interim_rmic_classes $(INTERIM_LANGTOOLS_JAR))
-BTRMIC_ARGS := -Xbootclasspath/p:$(BTRMIC_CP) -cp $(BTRMIC_CP)
+BTRMIC_ARGS := -cp $(BTRMIC_CP)
  RMIC := $(JAVA) $(BTRMIC_ARGS) sun.rmi.rmic.Main

  CLASSES_DIR := $(JDK_OUTPUTDIR)/modules


/Erik