hg: jdk8/build/corba: 7152336: Enable builds on Windows with MinGW/MSYS

[tim.bell at gmail.com]

Changeset: 0a5931be9176
Author:    tbell
Date:      2012-10-23 10:10 -0700
URL:       http://hg.openjdk.java.net/jdk8/build/corba/rev/0a5931be9176

7152336: Enable builds on Windows with MinGW/MSYS
Summary: Minimal makefile changes to enable building OpenJDK using MSYS on Windows7
Reviewed-by: ohair, tbell
Contributed-by: volker.simonis at gmail.com

! make/common/shared/Defs-utils.gmk
! make/common/shared/Defs-windows.gmk
! make/common/shared/Platform.gmk