hg: jdk9/hs/hotspot: 8152856: Xcode 7.3 -Wshift-negative-value compile failure on Mac OS X

[gerard.ziemski at oracle.com]

Changeset: 50b6bc2ac9e5
Author:    gziemski
Date:      2016-05-24 12:42 -0500
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/50b6bc2ac9e5

8152856: Xcode 7.3 -Wshift-negative-value compile failure on Mac OS X
Summary: Implement _lh_array_tag_type_value as const, not enum.
Reviewed-by: vlivanov, minqi

! src/share/vm/oops/klass.hpp
! src/share/vm/opto/library_call.cpp