Need official reviewers: hotspot makefile changes from build-infra

[Tim Bell]

Hi Kelly:

> These will be integrated into the hotspot-rt forest at http://hg.openjdk.java.net/hsx/hotspot-rt/hotspot/
>
> 8000990: Improve logging in hotspot repo builds for new build-infra
>
> http://cr.openjdk.java.net/~ohair/jdk8/hotspot.build.infra.logging/webrev/

The webrev looks fine to me, but I don't have the required roles to be 
an official reviewer.

I need one additional change in the hotspot 
*make/windows/makefiles/defs.make* file, which is a search/replace of 
USING_MINGW with USING_MSYS:


  % gdiff defs.make defs.make.tim
202c202
< # Check for MinGW
---
 > # Check for MinGW/MSYS
204c204
<   USING_MINGW=true
---
 >   USING_MSYS=true
218c218
< else ifeq ($(USING_MINGW), true)
---
 > else ifeq ($(USING_MSYS), true)
313c313
<   else ifeq ($(USING_MINGW), true)
---
 >   else ifeq ($(USING_MSYS), true)

> I did not make these changes, so I'd like to create this changeset with an appropriate owner and list of
> reviewers (which I will be one).
> If there are issues to resolve with these changes, it would be best if that appropriate owner made the changes
> in the build-infra forest and I will re-generate the patch.

We use MSYS to build on Windows, but we don't actually need anything 
from MinGW.   USING_MSYS is a better name for the variable.

The only thing to watch out for is that 'uname -s' on an MSYS system 
returns a string like "MINGW32_NT-6.1".  Other than that string compare, 
we can refer to USING_MSYS throughout the build.


Tim