--with-native-debug-symbols=none no longer works on mac after JDK-8145596

I believe the fix for JDK-8145596 broke the mac build with --with-native-debug-symbols=none. It will fail with the message below because libjsig.dylib.dSYM ends up in the export lists but doesn't exist.

make[3]: *** No rule to make target `/Users/tkrodrig/ws/hs-comp/build/macosx-x86_64-normal-server-fastdebug/support/modules_libs/java.base/server/libjsig.dylib.dSYM', needed by `all'. Stop.

I believe the problem is that the hotspot make files will ignore the setting of FULL_DEBUG_SYMBOLS. From hotspot/make/bsd/makefiles/defs.make.

ifneq ($(BUILD_FLAVOR),)
  # FULL_DEBUG_SYMBOLS not created for individual static libraries
  ifeq ($(STATIC_BUILD),false)
    ifeq ($(BUILD_FLAVOR), product)
      FULL_DEBUG_SYMBOLS ?= 1
      ENABLE_FULL_DEBUG_SYMBOLS = $(FULL_DEBUG_SYMBOLS)
    else
      # debug variants always get Full Debug Symbols (if available)
      ENABLE_FULL_DEBUG_SYMBOLS = 1
    endif
  endif
  $(eval $(call print_info, "ENABLE_FULL_DEBUG_SYMBOLS=$(ENABLE_FULL_DEBUG_SYMBOLS)"))