hg: jdk/hs: 8191683: Compile problem on ARM after JDK-8043070

[igor.veresov at oracle.com]

Changeset: 2cd1c2b03782
Author:    iveresov
Date:      2017-11-22 01:12 -0800
URL:       http://hg.openjdk.java.net/jdk/hs/rev/2cd1c2b03782

8191683: Compile problem on ARM after JDK-8043070
Summary: Make nmethod::_state explicitly a signed char
Reviewed-by: thartmann

! src/hotspot/share/code/nmethod.hpp
! src/hotspot/share/runtime/vmStructs.cpp