RFR: Fix non-PCH build failures: x86_64, aarch64, arm32, ppc64, s390x

[Roman Kennke]

Am 12.06.2018 um 19:35 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/build/sbsa-non-pch/webrev.01/
> 
> This fixes non-PCH build failures on multiple platforms. The failures have this form:
> 
> /pool/buildbot/slaves/sobornost/shenandoah-jdkX/build/src/hotspot/cpu/arm/gc/shenandoah/shenandoahBarrierSetAssembler_arm.hpp:48:29:
> error: ‘LIR_Assembler’ has not been declared
>    void gen_pre_barrier_stub(LIR_Assembler* ce, ShenandoahPreBarrierStub* stub) {
>                              ^~~~~~~~~~~~~
> 
> Instead of guessing what to forward-declare, we just include the proper headers. x86 does not need
> forward declarations because of that as well.
> 
> Testing: {x86_64, aarch64, arm32, ppc64, s390x} builds
> 
> Thanks,
> -Aleksey
> 

Go!