hg: jdk9/sandbox/jdk: 8140630: java/nio/Buffer/Basic.java crashes vm on linux-x64 using latest devkit to build

[chris.hegarty at oracle.com]

Changeset: 9ecb10ce62c6
Author:    bpb
Date:      2015-11-04 14:06 -0800
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/9ecb10ce62c6

8140630: java/nio/Buffer/Basic.java crashes vm on linux-x64 using latest devkit to build
Summary: Build Bits.c at a lower optimization level on linux-x64.
Reviewed-by: tbell

! make/lib/CoreLibraries.gmk