hg: jdk/jdk: 8230742: Make AggressiveUnboxing a diagnostic flag

[tobias.hartmann at oracle.com]

Changeset: 00aebe177a71
Author:    thartmann
Date:      2019-09-16 13:53 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/00aebe177a71

8230742: Make AggressiveUnboxing a diagnostic flag
Summary: AggressiveUnboxing is enabled by default. It should therefore be a diagnostic flag.
Reviewed-by: roland, shade

! src/hotspot/share/opto/c2_globals.hpp