RFR (XS) 8230215: MacOS debug build is broken after JDK-8230003

[Aleksey Shipilev]

Bug:
  https://bugs.openjdk.java.net/browse/JDK-8230215

I do this fix blindly, because my MacOS environments actually build jdk/jdk fine. I would appreciate
if anyone who has MacOS env currently broken would confirm it fixes the breakage.

Fix:
  https://cr.openjdk.java.net/~shade/8230215/webrev.01/

Testing: Linux x86_64 build, MacOS x86_64 build

-- 
Thanks,
-Aleksey