6484686: The next directory looks like it is no longer part of the build (deploy makefiles)

Summary: Getting rid of the _OUTPUTDIR settings. Using BUILD_PARENT_DIRECTORY instead. This solves problems with the "/build/windows-i586*" paths getting mangled on Windows builds (fastdebug builds in particular).
Reviewed-by: tbell

jdk/make/common/shared/Defs-control.gmk

@@ -69,9 +69,8 @@ endif
 # Get shared platform settings
 include $(JDK_MAKE_SHARED_DIR)/Platform.gmk
 
-# Default output directory
+# Default directory immediately above the "build" output directory (OUTPUTDIR)
 BUILD_PARENT_DIRECTORY=$(TOPDIR)
-_OUTPUTDIR=$(TOPDIR)/build/$(PLATFORM)-$(ARCH)
 
 # Get platform specific settings
 include $(JDK_MAKE_SHARED_DIR)/Defs.gmk