hg: valhalla/valhalla: 8229898: [lworld] Enable C1 by default

[ioi.lam at oracle.com]

Changeset: d1a51f42ce36
Author:    iklam
Date:      2019-09-12 09:18 -0700
URL:       https://hg.openjdk.java.net/valhalla/valhalla/rev/d1a51f42ce36

8229898: [lworld] Enable C1 by default
Reviewed-by: thartmann

! src/hotspot/share/runtime/arguments.cpp
! src/hotspot/share/runtime/globals.hpp
! test/hotspot/jtreg/compiler/valhalla/valuetypes/TestC1.java
! test/hotspot/jtreg/compiler/valhalla/valuetypes/TestCallingConventionC1.java
! test/hotspot/jtreg/compiler/valhalla/valuetypes/TestNewAcmp.java
! test/hotspot/jtreg/compiler/valhalla/valuetypes/TestWithfieldC1.java
! test/hotspot/jtreg/compiler/valhalla/valuetypes/ValueTypeTest.java