Need reviewer: Fix for windows cygwin issues

[Kumar Srinivasan]

I too tested tl build, as I have cygwin in a non default path, and I 
approve it.

Kumar

> Need reviewer
>
> 7012644: Regression: jdk/make/common/shared/Defs-windows.gmk has 
> problems on cygwin
> http://cr.openjdk.java.net/~ohair/openjdk7/jdk7-tl-cygwin/webrev/
>
> I'm still testing builds on all platforms to make sure this is all ok.
>
> I will push this to both the jdk7/build/jdk and jdk7/tl/jdk repository 
> once it's reviewed and I'm
> sure it doesn't cause any regressions to the build for RE.
>
> -kto
>